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: [[-18, 30], [45, 5, -36], [-43, -25], [18, -21]]

[-540, -8100, 1075, -378]