diff --git a/kmath-asm/src/main/kotlin/scientifik/kmath/expressions/AsmExpressions.kt b/kmath-asm/src/main/kotlin/scientifik/kmath/expressions/AsmExpressions.kt
index 36607d2b5..9a7ad69f2 100644
--- a/kmath-asm/src/main/kotlin/scientifik/kmath/expressions/AsmExpressions.kt
+++ b/kmath-asm/src/main/kotlin/scientifik/kmath/expressions/AsmExpressions.kt
@@ -7,6 +7,7 @@ import org.objectweb.asm.Opcodes.*
 import scientifik.kmath.operations.Algebra
 import scientifik.kmath.operations.Field
 import scientifik.kmath.operations.Space
+import java.io.File
 
 abstract class AsmCompiled<T>(@JvmField val algebra: Algebra<T>, @JvmField val constants: MutableList<T>) {
     abstract fun evaluate(arguments: Map<String, T>): T
@@ -184,10 +185,13 @@ class AsmGenerationContext<T>(classOfT: Class<*>, private val algebra: Algebra<T
 
     private fun visitLoadThis(): Unit = evaluateMethodVisitor.visitVarInsn(ALOAD, evaluateThisVar)
 
-    fun visitNumberConstant(value: Number): Unit = evaluateMethodVisitor.visitLdcInsn(value)
+    fun visitNumberConstant(value: Number) {
+        maxStack++
+        evaluateMethodVisitor.visitBoxedNumberConstant(value)
+    }
 
     fun visitLoadFromVariables(name: String, defaultValue: T? = null) = evaluateMethodVisitor.run {
-        maxStack++
+        maxStack += 2
         visitVarInsn(ALOAD, evaluateArgumentsVar)
 
         if (defaultValue != null) {
@@ -228,7 +232,7 @@ class AsmGenerationContext<T>(classOfT: Class<*>, private val algebra: Algebra<T
         visitCastToT()
     }
 
-    fun visitCastToT(): Unit = evaluateMethodVisitor.visitTypeInsn(CHECKCAST, T_CLASS)
+    private fun visitCastToT(): Unit = evaluateMethodVisitor.visitTypeInsn(CHECKCAST, T_CLASS)
 
     companion object {
         const val ASM_COMPILED_CLASS = "scientifik/kmath/expressions/AsmCompiled"
@@ -236,11 +240,11 @@ class AsmGenerationContext<T>(classOfT: Class<*>, private val algebra: Algebra<T
         const val MAP_CLASS = "java/util/Map"
         const val OBJECT_CLASS = "java/lang/Object"
         const val ALGEBRA_CLASS = "scientifik/kmath/operations/Algebra"
-        const val SPACE_CLASS = "scientifik/kmath/operations/Space"
         const val SPACE_OPERATIONS_CLASS = "scientifik/kmath/operations/SpaceOperations"
-        const val FIELD_CLASS = "scientifik/kmath/operations/Field"
         const val STRING_CLASS = "java/lang/String"
         const val FIELD_OPERATIONS_CLASS = "scientifik/kmath/operations/FieldOperations"
+        const val RING_OPERATIONS_CLASS = "scientifik/kmath/operations/RingOperations"
+        const val NUMBER_CLASS = "java/lang/Number"
     }
 }
 
@@ -285,8 +289,8 @@ internal class AsmProductExpression<T>(
         second.invoke(gen)
 
         gen.visitAlgebraOperation(
-            owner = AsmGenerationContext.SPACE_OPERATIONS_CLASS,
-            method = "times",
+            owner = AsmGenerationContext.RING_OPERATIONS_CLASS,
+            method = "multiply",
             descriptor = "(L${AsmGenerationContext.OBJECT_CLASS};L${AsmGenerationContext.OBJECT_CLASS};)L${AsmGenerationContext.OBJECT_CLASS};"
         )
     }
@@ -298,13 +302,13 @@ internal class AsmConstProductExpression<T>(
 ) : AsmExpression<T> {
     override fun invoke(gen: AsmGenerationContext<T>) {
         gen.visitLoadAlgebra()
-        expr.invoke(gen)
         gen.visitNumberConstant(const)
+        expr.invoke(gen)
 
         gen.visitAlgebraOperation(
-            owner = AsmGenerationContext.SPACE_CLASS,
+            owner = AsmGenerationContext.SPACE_OPERATIONS_CLASS,
             method = "multiply",
-            descriptor = "(L${AsmGenerationContext.OBJECT_CLASS};L${AsmGenerationContext.OBJECT_CLASS};)L${AsmGenerationContext.OBJECT_CLASS};"
+            descriptor = "(L${AsmGenerationContext.OBJECT_CLASS};L${AsmGenerationContext.NUMBER_CLASS};)L${AsmGenerationContext.OBJECT_CLASS};"
         )
     }
 }
@@ -326,7 +330,6 @@ internal class AsmDivExpression<T>(
     }
 }
 
-
 open class AsmFunctionalExpressionSpace<T>(
     val space: Space<T>,
     one: T
diff --git a/kmath-asm/src/main/kotlin/scientifik/kmath/expressions/MethodVisitors.kt b/kmath-asm/src/main/kotlin/scientifik/kmath/expressions/MethodVisitors.kt
index fdbc1062e..5b9a8afe8 100644
--- a/kmath-asm/src/main/kotlin/scientifik/kmath/expressions/MethodVisitors.kt
+++ b/kmath-asm/src/main/kotlin/scientifik/kmath/expressions/MethodVisitors.kt
@@ -1,17 +1,34 @@
 package scientifik.kmath.expressions
 
 import org.objectweb.asm.MethodVisitor
-import org.objectweb.asm.Opcodes
+import org.objectweb.asm.Opcodes.*
 
 fun MethodVisitor.visitLdcOrIConstInsn(value: Int) {
     when (value) {
-        -1 -> visitInsn(Opcodes.ICONST_M1)
-        0 -> visitInsn(Opcodes.ICONST_0)
-        1 -> visitInsn(Opcodes.ICONST_1)
-        2 -> visitInsn(Opcodes.ICONST_2)
-        3 -> visitInsn(Opcodes.ICONST_3)
-        4 -> visitInsn(Opcodes.ICONST_4)
-        5 -> visitInsn(Opcodes.ICONST_5)
+        -1 -> visitInsn(ICONST_M1)
+        0 -> visitInsn(ICONST_0)
+        1 -> visitInsn(ICONST_1)
+        2 -> visitInsn(ICONST_2)
+        3 -> visitInsn(ICONST_3)
+        4 -> visitInsn(ICONST_4)
+        5 -> visitInsn(ICONST_5)
         else -> visitLdcInsn(value)
     }
 }
+
+private val signatureLetters = mapOf(
+    java.lang.Byte::class.java to "B",
+    java.lang.Short::class.java to "S",
+    java.lang.Integer::class.java to "I",
+    java.lang.Long::class.java to "J",
+    java.lang.Float::class.java to "F",
+    java.lang.Double::class.java to "D",
+    java.lang.Short::class.java to "S"
+)
+
+fun MethodVisitor.visitBoxedNumberConstant(number: Number) {
+    val clazz = number.javaClass
+    val c = clazz.name.replace('.', '/')
+    visitLdcInsn(number)
+    visitMethodInsn(INVOKESTATIC, c, "valueOf", "(${signatureLetters[clazz]})L${c};", false)
+}
diff --git a/kmath-asm/src/test/kotlin/scientifik/kmath/expressions/AsmTest.kt b/kmath-asm/src/test/kotlin/scientifik/kmath/expressions/AsmTest.kt
index e95f8df76..402307050 100644
--- a/kmath-asm/src/test/kotlin/scientifik/kmath/expressions/AsmTest.kt
+++ b/kmath-asm/src/test/kotlin/scientifik/kmath/expressions/AsmTest.kt
@@ -1,23 +1,68 @@
 package scientifik.kmath.expressions
 
+import scientifik.kmath.operations.Algebra
 import scientifik.kmath.operations.RealField
 import kotlin.test.Test
 import kotlin.test.assertEquals
 
 class AsmTest {
-    @Test
-    fun test() {
-        val expr = AsmSumExpression(AsmConstantExpression(1.0), AsmVariableExpression("x"))
-
-        val gen = AsmGenerationContext(
-            java.lang.Double::class.java,
-            RealField,
-            "MyAsmCompiled"
+    private fun <T> testExpressionValue(
+        expectedValue: T,
+        expr: AsmExpression<T>,
+        arguments: Map<String, T>,
+        algebra: Algebra<T>,
+        clazz: Class<*>
+    ) {
+        assertEquals(
+            expectedValue, AsmGenerationContext(
+                clazz,
+                algebra,
+                "TestAsmCompiled"
+            ).also(expr::invoke).generate().evaluate(arguments)
         )
-
-        expr.invoke(gen)
-        val compiled = gen.generate()
-        val value = compiled.evaluate(mapOf("x" to 25.0))
-        assertEquals(26.0, value)
     }
+
+    @Suppress("UNCHECKED_CAST")
+    private fun testDoubleExpressionValue(
+        expectedValue: Double,
+        expr: AsmExpression<Double>,
+        arguments: Map<String, Double>,
+        algebra: Algebra<Double> = RealField,
+        clazz: Class<Double> = java.lang.Double::class.java as Class<Double>
+    ) = testExpressionValue(expectedValue, expr, arguments, algebra, clazz)
+
+    @Test
+    fun testSum() = testDoubleExpressionValue(
+        25.0,
+        AsmSumExpression(AsmConstantExpression(1.0), AsmVariableExpression("x")),
+        mapOf("x" to 24.0)
+    )
+
+    @Test
+    fun testConst() = testDoubleExpressionValue(
+        123.0,
+        AsmConstantExpression(123.0),
+        mapOf()
+    )
+
+    @Test
+    fun testDiv() = testDoubleExpressionValue(
+        0.5,
+        AsmDivExpression(AsmConstantExpression(1.0), AsmConstantExpression(2.0)),
+        mapOf()
+    )
+
+    @Test
+    fun testProduct() = testDoubleExpressionValue(
+        25.0,
+        AsmProductExpression(AsmVariableExpression("x"), AsmVariableExpression("x")),
+        mapOf("x" to 5.0)
+    )
+
+    @Test
+    fun testCProduct() = testDoubleExpressionValue(
+        25.0,
+        AsmConstProductExpression(AsmVariableExpression("x"), 5.0),
+        mapOf("x" to 5.0)
+    )
 }