Let's get this math done. We have 455 and we're going to multiply it by 11. This is the same as taking 455 and adding it to itself 11 times.
Step 1: 0 + 455 = 455
Step 2: 455 + 455 = 910
Step 3: 910 + 455 = 1365
Step 4: 1365 + 455 = 1820
Step 5: 1820 + 455 = 2275
Step 6: 2275 + 455 = 2730
Step 7: 2730 + 455 = 3185
Step 8: 3185 + 455 = 3640
Step 9: 3640 + 455 = 4095
Step 10: 4095 + 455 = 4550
Step 11: 4550 + 455 = 5005

So, 455*11 = 5005