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: [[18, -32, -29, -44], [22, 9, -23, 9, -2], [-4, 14], [-50, -48, 29, -4, -16]]

[-734976, 81972, -56, 4454400]