Sure thing, let's get straight to it. We start with 407 and we're going to multiply it by 33, which means adding 407 to itself 33 times.
Step 1: 0 + 407 = 407
Step 2: 407 + 407 = 814
Step 3: 814 + 407 = 1221
Step 4: 1221 + 407 = 1628
Step 5: 1628 + 407 = 2035
Step 6: 2035 + 407 = 2442
Step 7: 2442 + 407 = 2849
Step 8: 2849 + 407 = 3256
Step 9: 3256 + 407 = 3663
Step 10: 3663 + 407 = 4070
Step 11: 4070 + 407 = 4477
Step 12: 4477 + 407 = 4884
Step 13: 4884 + 407 = 5291
Step 14: 5291 + 407 = 5698
Step 15: 5698 + 407 = 6105
Step 16: 6105 + 407 = 6512
Step 17: 6512 + 407 = 6919
Step 18: 6919 + 407 = 7326
Step 19: 7326 + 407 = 7733
Step 20: 7733 + 407 = 8140
Step 21: 8140 + 407 = 8547
Step 22: 8547 + 407 = 8954
Step 23: 8954 + 407 = 9361
Step 24: 9361 + 407 = 9768
Step 25: 9768 + 407 = 10175
Step 26: 10175 + 407 = 10582
Step 27: 10582 + 407 = 10989
Step 28: 10989 + 407 = 11396
Step 29: 11396 + 407 = 11803
Step 30: 11803 + 407 = 12210
Step 31: 12210 + 407 = 12617
Step 32: 12617 + 407 = 13024
Step 33: 13024 + 407 = 13431

So, 407*33 = 13431