1A

DevGod

Elf Vtuber

Caution

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cpp

#include <iostream>
using namespace std;

int main() {
    long long n, m, a;
    cin >> n >> m >> a;

    long long x = (n + a - 1) / a;
    long long y = (m + a - 1) / a;

    cout << x * y;
    return 0;
}

js

let input = require('fs').readFileSync(0,'utf8').split(" ");

const n = Number(input[0]);
const m = Number(input[1]);
const a = Number(input[2]);

console.log( Math.ceil(n/a)*Math.ceil(m/a) );

py

import sys
import math

data = sys.stdin.read().split(" ")

n = int(data[0])
m = int(data[1])
a = int(data[2])

print(  math.ceil(n/a)*math.ceil(m/a) )