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: [-138, 921, -657, -589, -569, 358, -65, -819, -207, 114, -523, -397, -309, -471]

[-140, 920, -660, -590, -570, 360, -60, -820, -210, 110, -520, -400, -310, -470]