Definition: In this task you will be given a list of integers. You should round each integer to the nearest tens place. That means you should round the number to the nearest multiple of 10.
Input: [686, -305, -351, 688, -699, 447, -722, -356, 807, 115, 557, -209]

[690, -300, -350, 690, -700, 450, -720, -360, 810, 120, 560, -210]