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.
[[-45, -4], [9, 4, -42, 12], [-30, -43, -37, -47, -50], [-1, 23, -7, 20], [5, -7]]