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: [[18, -20], [3, -37, -38], [-9, -5, 34], [11, -12]]

[-360, 4218, 1530, -132]