So siehts ganz gut aus !

node_modules/es5-ext/math/imul/shim.js

@@ -0,0 +1,17 @@
+/* eslint no-bitwise: "off" */
+
+// Thanks: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference
+//         /Global_Objects/Math/imul
+
+"use strict";
+
+module.exports = function (val1, val2) {
+	var xh = (val1 >>> 16) & 0xffff
+	  , xl = val1 & 0xffff
+	  , yh = (val2 >>> 16) & 0xffff
+	  , yl = val2 & 0xffff;
+
+	// The shift by 0 fixes the sign on the high part
+	// the final |0 converts the unsigned value into a signed value
+	return (xl * yl + ((xh * yl + xl * yh) << 16 >>> 0)) | 0;
+};