Alright, let's solve this math problem step by step. First, we have the number 459. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 45. So, we're going to take the number 459 and add it to itself 45 times.
Step 1: 0 + 459 = 459
Step 2: 459 + 459 = 918
Step 3: 918 + 459 = 1377
Step 4: 1377 + 459 = 1836
Step 5: 1836 + 459 = 2295
Step 6: 2295 + 459 = 2754
Step 7: 2754 + 459 = 3213
Step 8: 3213 + 459 = 3672
Step 9: 3672 + 459 = 4131
Step 10: 4131 + 459 = 4590
Step 11: 4590 + 459 = 5049
Step 12: 5049 + 459 = 5508
Step 13: 5508 + 459 = 5967
Step 14: 5967 + 459 = 6426
Step 15: 6426 + 459 = 6885
Step 16: 6885 + 459 = 7344
Step 17: 7344 + 459 = 7803
Step 18: 7803 + 459 = 8262
Step 19: 8262 + 459 = 8721
Step 20: 8721 + 459 = 9180
Step 21: 9180 + 459 = 9639
Step 22: 9639 + 459 = 10098
Step 23: 10098 + 459 = 10557
Step 24: 10557 + 459 = 11016
Step 25: 11016 + 459 = 11475
Step 26: 11475 + 459 = 11934
Step 27: 11934 + 459 = 12393
Step 28: 12393 + 459 = 12852
Step 29: 12852 + 459 = 13311
Step 30: 13311 + 459 = 13770
Step 31: 13770 + 459 = 14229
Step 32: 14229 + 459 = 14688
Step 33: 14688 + 459 = 15147
Step 34: 15147 + 459 = 15606
Step 35: 15606 + 459 = 16065
Step 36: 16065 + 459 = 16524
Step 37: 16524 + 459 = 16983
Step 38: 16983 + 459 = 17442
Step 39: 17442 + 459 = 17901
Step 40: 17901 + 459 = 18360
Step 41: 18360 + 459 = 18819
Step 42: 18819 + 459 = 19278
Step 43: 19278 + 459 = 19737
Step 44: 19737 + 459 = 20196
Step 45: 20196 + 459 = 20655

So, 459*45 = 20655