diff --git a/A simple calculator using functions.ipynb b/A simple calculator using functions.ipynb
index 9ed6bb2..2047de5 100644
--- a/A simple calculator using functions.ipynb	
+++ b/A simple calculator using functions.ipynb	
@@ -25,16 +25,19 @@
       "welcome to my calculator\n",
       "A)dd numbers\n",
       "S)ubtract numbers\n",
+      "M)ultiply numbers\n" ,
       "choose your options\n",
       "enter the first number5\n",
       "enter the first number4\n",
       "the answer from your calcaulation is=1\n",
       "A)dd numbers\n",
       "S)ubtract numbers\n",
+      "M)ultiply numbers\n",
       "choose your optionr\n",
       "sorry that is not a valid menu choice \n",
       "A)dd numbers\n",
       "S)ubtract numbers\n",
+      "M)ultiply numbers\n",
       "choose your optiona\n",
       "enter the first numbera\n",
       "That was not a valid number.. please try again\n",
@@ -97,6 +100,10 @@
     "    \n",
     "    return x\n",
     "\n",
+    "def mul(x,y):\n",
+    "    \n",
+    "    return x*y\n",
+    "\n",
     "def add(x,y):\n",
     "    \n",
     "    return x+y\n",