Problem:
Rectangle

Write a program which calculates the area and perimeter of a given rectangle.

Input

The length a and breadth b of the rectangle are given in a line separated by a single space.

Output

Print the area and perimeter of the rectangle in a line. The two integers should be separated by a single space.

Constraints

1 ≤ a, b ≤ 100

Sample Input 1

3 5

Sample Output 1

15 16

Solution in PHP (judge verdict: Wrong Answer)

<?php
$a = fgets(STDIN);
$arr = explode(' ', $a);

$arr[0]; 
echo ($arr[0] * $arr[1]);

echo ' ';

$arr[1]; 
echo 2*($arr[0] + $arr[1]);

?> 

correct me please