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: [-638, 736, 55, 621, -203, -294, -546, 856, 399, -411, 558, -978]

[-640, 740, 60, 620, -200, -290, -550, 860, 400, -410, 560, -980]