Let's get this math done. We have 160 and we're going to multiply it by 8. This is the same as taking 160 and adding it to itself 8 times.
Step 1: 0 + 160 = 160
Step 2: 160 + 160 = 320
Step 3: 320 + 160 = 480
Step 4: 480 + 160 = 640
Step 5: 640 + 160 = 800
Step 6: 800 + 160 = 960
Step 7: 960 + 160 = 1120
Step 8: 1120 + 160 = 1280

So, 160*8 = 1280