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: [-778, 398, 50, -401, 755, 142, 145, -464, 54, -68, 605, -671, 721, 926, -637]

[-780, 400, 50, -400, 760, 140, 140, -460, 50, -70, 600, -670, 720, 930, -640]