diff --git a/calculator/calculator.app.js b/calculator/calculator.app.js
index 81b19bc..78f4b2d 100644
--- a/calculator/calculator.app.js
+++ b/calculator/calculator.app.js
@@ -170,7 +170,7 @@ function getIntWithPrecision(x) {
   var xRadix = xStr.indexOf('.');
   var xPrecision = xRadix === -1 ? 0 : xStr.length - xRadix - 1;
   return {
-    num: Number(xStr.replace('.', '')),
+    num: parseInt(xStr.replace('.', ''), 10),
     p: xPrecision
   };
 }