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: [[8, -23, -13, -50, 4], [-21, 18], [-9, -36, 46, 39, 9], [-18, 48]]

[-478400, -378, 5231304, -864]