22. Supermarket Digit Product Price

Difficulty: easy · Math

Problem

A supermarket prints a code `N` on every product. When the scanner reads `N`, the price of the item is the **product of all the digits** of `N`. Given `N`, print the price.

Input

A single line containing the positive integer `N` (no leading zeros).

Output

Print the product of the digits of `N`.

Example 1

Input:
5244
Output:
160

Explanation: 5 * 2 * 4 * 4 = 160.

Example 2

Input:
1023
Output:
0

Explanation: The digit 0 makes the product 0.

Constraints

- 1 <= N <= 10^18

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