ruby_백준_2588 곱셈

https://www.acmicpc.net/problem/2588

def Q_2588()
  numA = gets.to_i
  numB = gets.chomp
  numBs = numB.split("")
  i = numBs.length - 1
  sumAB = numA * numB.to_i

  # (0..i).each do |data|
  #   puts numA * numBs[i-data].to_i
  # end
  for data in 0..i
    puts numA * numBs[i-data].to_i
  end
  print sumAB
end
Q_2588()