[백준] 19698번 : 헛간 청약 - Javascript(자바스크립트)

https://www.acmicpc.net/problem/19698

const fs=require('fs')
let ip=fs.readFileSync('/dev/stdin').toString().split(' ')
var n=parseInt(ip[0])
var w=parseInt(ip[1])
var h=parseInt(ip[2])
var l=parseInt(ip[3])
w=parseInt(w/l)
h=parseInt(h/l)
var sum=w*h
if(n>=sum) console.log(sum)
else console.log(n)