Problems

# Simple Calculator

# Simple Calculator

A simple calculator accepts the following kinds of strings as input:

**num**+**num****num**-**num****num*****num****num**/**num**

where **num** is a positive integer, between **1** and **10000** inclusive.

Find the value produced by the given expression. Here +, -, *, and / denote addition, subtraction, multiplication and division respectively. All operations are done on integers, so "**5** / **3**" is **1**.

#### Input

One string that a simple calculator accepts.

#### Output

Print the result of given expression.

Input example #1

3 * 12

Output example #1

36

Input example #2

16 + 45

Output example #2

61

Input example #3

19 / 7

Output example #3

2