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: [[34, -46], [-28, 34, 4, -47], [22, -19, -37, -12]]

[-1564, 178976, -185592]