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: [[-30, -5, 21, 7, -9], [2, -5, 34], [-45, -22, 31, 16], [37, 31, 5, -45]]

[-198450, -340, 491040, -258075]