Noise

Two students keep talking during class. Sanggeun, a new teacher, decides to quiet the class by writing a large arithmetic problem on the board.

The students have learned only addition and multiplication, and both numbers written on the board are powers of 10. Each number has at most 100 digits.

Given two positive integers A and B and an operator, write a program that computes either A + B or A * B.

The first line contains a positive integer A.

The second line contains an operator, either + or *.

The third line contains a positive integer B.

Both A and B are powers of 10, and each has at most 100 digits.

If the given operator is +, output A + B. If it is *, output A * B.