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: [[47, -28, -11, 35, 36], [23, 7, -25], [-28, -4], [-20, 42]]

[18239760, -4025, 112, -840]