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: [-400, 550, 950, 96, 140, 777, 859, 401, -897, -421, -211, -434]

[-400, 550, 950, 100, 140, 780, 860, 400, -900, -420, -210, -430]