let input = [

    // '5 8 4 1'

    '5 3 2 3'

];


let print = this.print || console.log;
let gets = this.gets || ((arr, index) => () => arr[index++])(input, 0);


let arr = gets().split(' ');

// console.log(arr);


let T = arr[0];

let N = arr[1];

let S = arr[2];

let P = arr[3];

let targetBoats = T * N;


let boatPerPacket = S * P;

console.log(targetBoats, boatPerPacket);


let paperNeeded = targetBoats / boatPerPacket;

print(Math.ceil(paperNeeded));