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: [[-5, -48], [-37, -1, -48, 21], [21, 21, 12, 40, 39]]

[240, -37296, 8255520]