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.
[[-42, -50, 46], [33, -42], [-41, -38, -3], [-42, 29], [30, 11, -18, 48]]