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: [[-5, -42, -49, -9, 3], [-9, 25], [4, 18]]

[277830, -225, 72]