Answer:
520
Explanation:
First of all I just wanna say 104 five times would also equal 520 so multiplication is just an easier way to get that. First you line the numbers up vertically and look at your first numbers to the right. Which would be 5x4 and that equals 20. Since 20 is a two digit number you keep the zero and add the 2 to the next number. Next would be 5x0 which equals 0 but since you have the 2 you do 2+0 which equals 2 so you add that to your answer. Lastly you would do 5x1 which equals 5 and add the numbers up and get 520.
Hope this makes sense lol it's for me hard to explain someone the answer if I'm not face to face with them so sorry if it makes no sense.