Sure thing! We've got 18 and we're gonna multiply it by 55. That's the same as adding 18 to itself 55 times.
Step 1: 0 + 18 = 18
Step 2: 18 + 18 = 36
Step 3: 36 + 18 = 54
Step 4: 54 + 18 = 72
Step 5: 72 + 18 = 90
Step 6: 90 + 18 = 108
Step 7: 108 + 18 = 126
Step 8: 126 + 18 = 144
Step 9: 144 + 18 = 162
Step 10: 162 + 18 = 180
Step 11: 180 + 18 = 198
Step 12: 198 + 18 = 216
Step 13: 216 + 18 = 234
Step 14: 234 + 18 = 252
Step 15: 252 + 18 = 270
Step 16: 270 + 18 = 288
Step 17: 288 + 18 = 306
Step 18: 306 + 18 = 324
Step 19: 324 + 18 = 342
Step 20: 342 + 18 = 360
Step 21: 360 + 18 = 378
Step 22: 378 + 18 = 396
Step 23: 396 + 18 = 414
Step 24: 414 + 18 = 432
Step 25: 432 + 18 = 450
Step 26: 450 + 18 = 468
Step 27: 468 + 18 = 486
Step 28: 486 + 18 = 504
Step 29: 504 + 18 = 522
Step 30: 522 + 18 = 540
Step 31: 540 + 18 = 558
Step 32: 558 + 18 = 576
Step 33: 576 + 18 = 594
Step 34: 594 + 18 = 612
Step 35: 612 + 18 = 630
Step 36: 630 + 18 = 648
Step 37: 648 + 18 = 666
Step 38: 666 + 18 = 684
Step 39: 684 + 18 = 702
Step 40: 702 + 18 = 720
Step 41: 720 + 18 = 738
Step 42: 738 + 18 = 756
Step 43: 756 + 18 = 774
Step 44: 774 + 18 = 792
Step 45: 792 + 18 = 810
Step 46: 810 + 18 = 828
Step 47: 828 + 18 = 846
Step 48: 846 + 18 = 864
Step 49: 864 + 18 = 882
Step 50: 882 + 18 = 900
Step 51: 900 + 18 = 918
Step 52: 918 + 18 = 936
Step 53: 936 + 18 = 954
Step 54: 954 + 18 = 972
Step 55: 972 + 18 = 990

So, 18*55 = 990