#!/usr/bin/env ruby
# -*- coding: utf-8 -*-


def shouhizei(kakaku,zeiritu)
  zeikomi = kakaku*zeiritu

  zeikomi.to_i

end


puts "商品の税込価格を計算します"
print "価格を入力:"
ne = gets.to_i
print "税率を入力:"
zei = gets.to_f
printf("この商品の税込価格は%d円です\n", shouhizei(ne,zei))