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: [863, -993, -826, 580, -61, 301, -720, -326, 412, -730, 89, -215, -102, 112, -259]

[860, -990, -830, 580, -60, 300, -720, -330, 410, -730, 90, -220, -100, 110, -260]