Array Size in Bytes

Source: Phước Hưng OJ

Version: Phuoc Hung OJ Extended

Problem Statement

An array has $n$ consecutive elements, each occupying exactly $E$ bytes. The total array size is

Compute the total number of bytes. Large inputs may produce a result beyond the range of a 32-bit int.

Input

One line contains two positive integers $n$ and $E$.

Output

Print the integer $B=nE$.

Subtasks

Subtask 1 (20 points): $1\le n,E\le10^4$ and $nE\le2\,147\,483\,647$.

Subtask 2 (30 points): $2\,147\,483\,647<nE\le10^{12}$.

Subtask 3 (50 points): $1\le n\le10^9$, $1\le E\le10^6$.

Examples

Input

250000000 8

Output

2000000000

Explanation

There are $250\,000\,000$ elements and each occupies $8$ bytes. Therefore

The full tests also include larger products, so an integer type with sufficient range is required.