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: [421, -367, 286, -475, 497, -278, 434, 793, -396, 731, -856, 56, 334, 788, 272]

[420, -370, 290, -480, 500, -280, 430, 790, -400, 730, -860, 60, 330, 790, 270]