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 Ruby (2.7.1) (judge verdict: Runtime Error)

num = gets.to_i
array = gets.split(' ').map(&:to_i)
ansew = 1

num.times do |i|
    ansew = array[i] * ansew
    if ansew > 10 ** 18
        puts "-1"
        break
    end
end

if ansew < 10 ** 18
    puts ansew
end