Definition: In this task you will be given a list of lists, of numbers. For every inner list, you should multiply every number in that list and put the results in your answer. The output should be a list of numbers with the same length as the number of the lists in the input list.
Input: [[10, 13, -24, -31], [6, 31, 50, -11, 1], [-49, -12, -15, 44, -13], [-48, -21, -24, -4, 28]]

[96720, -102300, 5045040, 2709504]