213 - Pond Digging

Pond Digging

Time Limit: 1 sec


The Problem

Mrs. Rahman has a rectangle plot. He wants to dig a pond there. For this he called Ali. Ali said he will charge taka as per square of the pond.  Ali also said 2 miters will be the edge of the pond. Your work is to help Mrs. Rahman to find the area of the pond as he can easily pay Ali.



The Input

The input file contains two integer numbers length, L (L<=500) and width, W (W<=400) of the plot.


The Output

The output will show the area of the pond in a separate line.


Sample Input

80 65


Sample Output






Problem Setter: Samia Safa Ahmed

Special thanks to Shahin ShamS