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: [[3, -2], [-12, -49, 20], [36, 8, -45]]

[-6, 11760, -12960]