B. Is It Easy ?
time limit per test
1 second
memory limit per test
256 megabytes
input
standard input
output
standard output

ArabellaCPC's Judges decided to print the problem statements.

Each one of the $$$n$$$ participated teams will get exactly one copy of the problem-statements, and each copy costs $$$k$$$ coins.

How many coins it will cost judges to print exactly one problem-statements for each team.

Input

The input consists of two integers $$$n$$$ and $$$k$$$, $$$(1 \leq n,k \leq 1000)$$$

Output

print the total cost of all problem statements.

Examples
Input
5 3
Output
15
Input
4 1
Output
4