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: [[40, -6, -16], [-25, 15, 32, -8, 4], [-36, -40, -15, 7, -45], [45, -17, 30, 47, -42]]

[3840, 384000, 6804000, 45303300]