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: [[19, -30, 14, 3], [-13, -17, 22], [-20, 47, 12, -21], [50, -28, -45, -18]]

[-23940, 4862, 236880, -1134000]