OK, let's work through this together. We're starting with 111 and we're going to multiply it by 33, which means we add 111 to itself 33 times.
Step 1: 0 + 111 = 111
Step 2: 111 + 111 = 222
Step 3: 222 + 111 = 333
Step 4: 333 + 111 = 444
Step 5: 444 + 111 = 555
Step 6: 555 + 111 = 666
Step 7: 666 + 111 = 777
Step 8: 777 + 111 = 888
Step 9: 888 + 111 = 999
Step 10: 999 + 111 = 1110
Step 11: 1110 + 111 = 1221
Step 12: 1221 + 111 = 1332
Step 13: 1332 + 111 = 1443
Step 14: 1443 + 111 = 1554
Step 15: 1554 + 111 = 1665
Step 16: 1665 + 111 = 1776
Step 17: 1776 + 111 = 1887
Step 18: 1887 + 111 = 1998
Step 19: 1998 + 111 = 2109
Step 20: 2109 + 111 = 2220
Step 21: 2220 + 111 = 2331
Step 22: 2331 + 111 = 2442
Step 23: 2442 + 111 = 2553
Step 24: 2553 + 111 = 2664
Step 25: 2664 + 111 = 2775
Step 26: 2775 + 111 = 2886
Step 27: 2886 + 111 = 2997
Step 28: 2997 + 111 = 3108
Step 29: 3108 + 111 = 3219
Step 30: 3219 + 111 = 3330
Step 31: 3330 + 111 = 3441
Step 32: 3441 + 111 = 3552
Step 33: 3552 + 111 = 3663

So, 111*33 = 3663