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: [990, 164, -984, -827, -807, 356, 724, 253, -294, -979, -712, 976, -658, -252, 402]

[990, 160, -980, -830, -810, 360, 720, 250, -290, -980, -710, 980, -660, -250, 400]