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

def time(distance,speed)
  printf("%dmを分速%dmで走ると何分かかる?\n",distance,speed)
  x = gets.to_i
  answer =  distance/speed
  if x == answer || x == answer + "分"
    puts"正解!"
  else
    puts"不正解..."
  end
end

time(1000,25)
time(250,25)
time(2000,40)