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.
[[4, -34], [-35, 50, -17, -7], [-8, -11, -3], [19, -22], [-42, -23, -19, -50]]