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: [[27, -36], [-24, 45, 2, -50], [32, 50], [31, 49]]

[-972, 108000, 1600, 1519]