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: [[15, -38, -22], [49, 41], [21, 23], [29, -6, 11, -20, -3]]

[12540, 2009, 483, -114840]