Rectangle Area

Version: Phuoc Hung OJ Extended

Problem Statement

A rectangle has adjacent side lengths $a$ and $b$. Its area is $S=ab$. Compute the area and print exactly 2 decimal places.

Input

The only line contains real adjacent side lengths $a$ and $b$ of the rectangle.

Output

Print the rectangle area with exactly 2 decimal places.

Subtasks

• Subtask 1 (100 points): $a,b\ge0$.

Examples

Example 1

Input

2.5 4

Output

10.00

Explanation. Substituting 2.5, 4 into a × b gives approximately 10. The required output formatting produces 10.00.

Example 2

Input

0 10

Output

0.00

Explanation. Substituting 0, 10 into a × b gives approximately 0. The required output formatting produces 0.00.

Example 3

Input

3.1415 2

Output

6.28

Explanation. Substituting 3.1415, 2 into a × b gives approximately 6.283. The required output formatting produces 6.28.