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: [[-39, -31, -40, -18], [-27, -48, 34, -37], [-13, -31, 35, 2]]

[870480, -1630368, 28210]