Without delay, let's solve this. We've got 435 and we will be multiplying it by 55, that is, adding 435 to itself 55 times.
Step 1: 0 + 435 = 435
Step 2: 435 + 435 = 870
Step 3: 870 + 435 = 1305
Step 4: 1305 + 435 = 1740
Step 5: 1740 + 435 = 2175
Step 6: 2175 + 435 = 2610
Step 7: 2610 + 435 = 3045
Step 8: 3045 + 435 = 3480
Step 9: 3480 + 435 = 3915
Step 10: 3915 + 435 = 4350
Step 11: 4350 + 435 = 4785
Step 12: 4785 + 435 = 5220
Step 13: 5220 + 435 = 5655
Step 14: 5655 + 435 = 6090
Step 15: 6090 + 435 = 6525
Step 16: 6525 + 435 = 6960
Step 17: 6960 + 435 = 7395
Step 18: 7395 + 435 = 7830
Step 19: 7830 + 435 = 8265
Step 20: 8265 + 435 = 8700
Step 21: 8700 + 435 = 9135
Step 22: 9135 + 435 = 9570
Step 23: 9570 + 435 = 10005
Step 24: 10005 + 435 = 10440
Step 25: 10440 + 435 = 10875
Step 26: 10875 + 435 = 11310
Step 27: 11310 + 435 = 11745
Step 28: 11745 + 435 = 12180
Step 29: 12180 + 435 = 12615
Step 30: 12615 + 435 = 13050
Step 31: 13050 + 435 = 13485
Step 32: 13485 + 435 = 13920
Step 33: 13920 + 435 = 14355
Step 34: 14355 + 435 = 14790
Step 35: 14790 + 435 = 15225
Step 36: 15225 + 435 = 15660
Step 37: 15660 + 435 = 16095
Step 38: 16095 + 435 = 16530
Step 39: 16530 + 435 = 16965
Step 40: 16965 + 435 = 17400
Step 41: 17400 + 435 = 17835
Step 42: 17835 + 435 = 18270
Step 43: 18270 + 435 = 18705
Step 44: 18705 + 435 = 19140
Step 45: 19140 + 435 = 19575
Step 46: 19575 + 435 = 20010
Step 47: 20010 + 435 = 20445
Step 48: 20445 + 435 = 20880
Step 49: 20880 + 435 = 21315
Step 50: 21315 + 435 = 21750
Step 51: 21750 + 435 = 22185
Step 52: 22185 + 435 = 22620
Step 53: 22620 + 435 = 23055
Step 54: 23055 + 435 = 23490
Step 55: 23490 + 435 = 23925

So, 435*55 = 23925