[백준] 2588번 : 곱셈 - Dart(다트)

https://www.acmicpc.net/problem/2588

import 'dart:io';
void main(){
    int? n=int.parse(stdin.readLineSync()!);
    int? m=int.parse(stdin.readLineSync()!);
    
    var num=m%10;
    var a=num*n;
    m~/=10;
        
    num=m%10;
    var b=num*n;
    m~/=10;
        
    num=m%10;
    var c=num*n;
        
    var sum=a+b*10+c*100;
    print(a);
    print(b);
    print(c);
    print(sum);
}