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: [-405, -557, -734, 497, -94, -387, -641, 192, -243, -579, 977, 608, 536, -141, -865]

[-400, -560, -730, 500, -90, -390, -640, 190, -240, -580, 980, 610, 540, -140, -860]