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: [[28, -2, 49, 19, 45], [27, -40, 45], [-7, -10, -3], [-50, -5]]

[-2346120, -48600, -210, 250]