added new function
diff --git a/src/main/webapp/index.jsp b/src/main/webapp/index.jsp
index 42c2bc3..fdf31aa 100644
--- a/src/main/webapp/index.jsp
+++ b/src/main/webapp/index.jsp
@@ -20,6 +20,7 @@
 </label>
 <input type="radio" name="r2" value="sub" />subtraction 
 <br />
+<input type="radio" name="r2" value="mul" />product
 
  
 </div>