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: [[21, -1, 49], [18, 20, 41], [29, -17, -34], [17, -30]]

[-1029, 14760, 16762, -510]