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.
[[-4, -39, -35, -21], [-1, -6, 30, 35, -25], [34, -31, 46], [35, -19]]