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: [[-4, -8, 48], [-30, -19, -39, -48], [3, -46, 5, -14], [6, -46, -31], [-1, -15]]

[1536, 1067040, 9660, 8556, 15]