OK, let's crack this. We're given 460 and our task is to multiply it by 20. Essentially, we'll be adding 460 to itself 20 times.
Step 1: 0 + 460 = 460
Step 2: 460 + 460 = 920
Step 3: 920 + 460 = 1380
Step 4: 1380 + 460 = 1840
Step 5: 1840 + 460 = 2300
Step 6: 2300 + 460 = 2760
Step 7: 2760 + 460 = 3220
Step 8: 3220 + 460 = 3680
Step 9: 3680 + 460 = 4140
Step 10: 4140 + 460 = 4600
Step 11: 4600 + 460 = 5060
Step 12: 5060 + 460 = 5520
Step 13: 5520 + 460 = 5980
Step 14: 5980 + 460 = 6440
Step 15: 6440 + 460 = 6900
Step 16: 6900 + 460 = 7360
Step 17: 7360 + 460 = 7820
Step 18: 7820 + 460 = 8280
Step 19: 8280 + 460 = 8740
Step 20: 8740 + 460 = 9200

So, 460*20 = 9200