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: [[11, 49], [-8, 6, -47, -50], [22, 32], [20, 1]]

[539, -112800, 704, 20]