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.
[[-15, -38, 7, 21], [8, -49, -26, 22, 42], [12, -31, 12, -10], [32, 34], [25, 40], [-16, 33, -50, 43, -13], [13, 39, 13, -34, 23], [-14, -4, -22, 19, 50]]