OK, let's crack this. We're given 404 and our task is to multiply it by 10. Essentially, we'll be adding 404 to itself 10 times.
Step 1: 0 + 404 = 404
Step 2: 404 + 404 = 808
Step 3: 808 + 404 = 1212
Step 4: 1212 + 404 = 1616
Step 5: 1616 + 404 = 2020
Step 6: 2020 + 404 = 2424
Step 7: 2424 + 404 = 2828
Step 8: 2828 + 404 = 3232
Step 9: 3232 + 404 = 3636
Step 10: 3636 + 404 = 4040

So, 404*10 = 4040