diff -r b42bfe334128 -r eecf6077ec4e vm/src/test/java/org/apidesign/vm4brwsr/Numbers.java
--- a/vm/src/test/java/org/apidesign/vm4brwsr/Numbers.java	Mon Feb 04 09:41:33 2013 +0100
+++ b/vm/src/test/java/org/apidesign/vm4brwsr/Numbers.java	Tue Feb 05 16:40:01 2013 +0100
@@ -102,12 +102,20 @@
         return (disX.readLong() * disY.readLong());
     }
     
-    public static long divL(long x, long y) {
-        return (x / y);
+    public static long divL(byte[] arrX, byte[] arrY) throws IOException {
+        ByteArrayInputStream isX = new ByteArrayInputStream(arrX);
+        DataInputStream disX = new DataInputStream(isX);
+        ByteArrayInputStream isY = new ByteArrayInputStream(arrY);
+        DataInputStream disY = new DataInputStream(isY);
+        return (disX.readLong() / disY.readLong());
     }
     
-    public static long modL(long x, long y) {
-        return (x % y);
+    public static long modL(byte[] arrX, byte[] arrY) throws IOException {
+        ByteArrayInputStream isX = new ByteArrayInputStream(arrX);
+        DataInputStream disX = new DataInputStream(isX);
+        ByteArrayInputStream isY = new ByteArrayInputStream(arrY);
+        DataInputStream disY = new DataInputStream(isY);
+        return (disX.readLong() % disY.readLong());
     }
     
     public static long shlL(byte[] arrValue, int nBits) throws IOException {