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: [[21, 24, 49], [17, -48, -13, -49, 9], [-49, -48, -26, 20, 6], [-40, -15, 20, 50, 24]]

[24696, -4678128, -7338240, 14400000]