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: [[-29, -46], [-12, -28, 13, 11, 39], [21, -50]]

[1334, 1873872, -1050]