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: [397, -546, 209, 547, 121, -291, 90, 340, 912, -869, 690, -984, -668, -869, -809]

[400, -550, 210, 550, 120, -290, 90, 340, 910, -870, 690, -980, -670, -870, -810]