Write a program that takes a line with an arithmetic expression (contains whole or material numbers and Operations & NBSP; +, & nbsp; -, & nbsp; *, & nbsp; /) and deduces the result of its calculation, observing the standard procedure for operations (multiplication and division are performed earlier Addition and subtraction).
Input format
One line containing an arithmetic expression. The numbers and signs of operations (+, & nbsp; -, & nbsp; *, & nbsp; /) are separated by gaps. Numbers can be whole or material, as well as negative.
Output format
One number & mdash; The result of calculating the expression. The result can be an entire or material number.
Hint
There will be no clue here, decide for yourself!