Problem:
Score : 100 points

Problem Statement

Compute A \times B.

Constraints

1 \leq A \leq 100

1 \leq B \leq 100

All values in input are integers.

Input

Input is given from Standard Input in the following format:

A B

Output

Print the value A \times B as an integer.

Sample Input 1

2 5

Sample Output 1

10

We have 2 \times 5 = 10.

Sample Input 2

100 100

Sample Output 2

10000

Solution in PHP (7.4.4) (judge verdict: Runtime Error)

<?php
$N = fgets(STDIN);
$input=explode(' ',(fgets(STDIN)));

$ans = 1;
for ($i = 0; $i < $N; $i++) {
    $ans = $ans * $input[$i];
}

if ($ans > 10**18) {
  $ans = '-1';
}

print_r (int)$ans;
?>