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)

class B169
  def call(n, a_s)
    result = a_s.inject(:*)
    if result > (10 ** 18)
      -1
    else
      result
    end
  end

  def main
    n = gets
    a_s = gets.split(' ').map { |x| x.to_i }
    puts call(n, a_s)
  end
end

B169.new.main