#85. Cube surface
You get the edge a of a cube. Find the area of its whole surface (6·a·a).
### Input
Each on its own line: a (1 ≤ value ≤ 50).
### Output
One integer.
Examples
Input
34
Output
6936
Input
27
Output
4374
💡 You can solve it with Python, JavaScript or blocks. Read the input line by line with input(). Don't print a question (like input("Number: ")). Print exactly what the output asks for, nothing more.