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.
[[-47, 40, -21, -21], [44, -27], [-26, -31], [-49, 46], [37, -42, 39, 29]]