1070. A X B

     Scanner sc = new Scanner(System.in);
     int n=sc.nextInt();
     for(int i=0;i<n;i++){
         BigInteger a = sc.nextBigInteger();
         BigInteger b = sc.nextBigInteger(); 
         System.out.println(a.multiply(b)); 
     }
 }

n = int(input())
for i in range(n):
    a,b = map(int,input().split())
    print(a*b)