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: [[12, -15, 27, -18], [3, 34, -38, 15], [-20, -49]]

[87480, -58140, 980]