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: [804, -79, 915, 626, -236, -3, -15, 499, -988, -349, -839, 530, -221, 640, -808]

[800, -80, 920, 630, -240, 0, -20, 500, -990, -350, -840, 530, -220, 640, -810]