Problem:
Score : 100 points

Problem Statement

Compute A \times B.

Constraints

1 \leq A \leq 100

1 \leq B \leq 100

All values in input are integers.

Input

Input is given from Standard Input in the following format:

A B

Output

Print the value A \times B as an integer.

Sample Input 1

2 5

Sample Output 1

10

We have 2 \times 5 = 10.

Sample Input 2

100 100

Sample Output 2

10000

Solution in Pascal (FPC 3.0.4) (judge verdict: Wrong Answer)

program main;
var i, n, p, t : int64;
 
begin
  readln(n);
  p := 1;
  for i := 1 to n do begin
    read(t);
    p := p * t;
  end;
  readln;
  if p > 1000000000000000000 then
    writeln('-1')
  else writeln(p);
end.