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, -25, 19, -49], [-28, 10, 45, 17], [3, 37], [10, -23, -34], [-31, -34]]

[791350, -214200, 111, 7820, 1054]