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.
[[32, -49, -48], [-30, -19, 20, -18, -7], [39, -31, 2], [19, -4, -49, 29]]