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: [[48, -11], [34, 29, -18, -7, -21], [-50, -22, 23], [40, -6, 1]]

[-528, -2608956, 25300, -240]