Alright, let's solve this math problem step by step. First, we have the number 458. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 46. So, we're going to take the number 458 and add it to itself 46 times.
Step 1: 0 + 458 = 458
Step 2: 458 + 458 = 916
Step 3: 916 + 458 = 1374
Step 4: 1374 + 458 = 1832
Step 5: 1832 + 458 = 2290
Step 6: 2290 + 458 = 2748
Step 7: 2748 + 458 = 3206
Step 8: 3206 + 458 = 3664
Step 9: 3664 + 458 = 4122
Step 10: 4122 + 458 = 4580
Step 11: 4580 + 458 = 5038
Step 12: 5038 + 458 = 5496
Step 13: 5496 + 458 = 5954
Step 14: 5954 + 458 = 6412
Step 15: 6412 + 458 = 6870
Step 16: 6870 + 458 = 7328
Step 17: 7328 + 458 = 7786
Step 18: 7786 + 458 = 8244
Step 19: 8244 + 458 = 8702
Step 20: 8702 + 458 = 9160
Step 21: 9160 + 458 = 9618
Step 22: 9618 + 458 = 10076
Step 23: 10076 + 458 = 10534
Step 24: 10534 + 458 = 10992
Step 25: 10992 + 458 = 11450
Step 26: 11450 + 458 = 11908
Step 27: 11908 + 458 = 12366
Step 28: 12366 + 458 = 12824
Step 29: 12824 + 458 = 13282
Step 30: 13282 + 458 = 13740
Step 31: 13740 + 458 = 14198
Step 32: 14198 + 458 = 14656
Step 33: 14656 + 458 = 15114
Step 34: 15114 + 458 = 15572
Step 35: 15572 + 458 = 16030
Step 36: 16030 + 458 = 16488
Step 37: 16488 + 458 = 16946
Step 38: 16946 + 458 = 17404
Step 39: 17404 + 458 = 17862
Step 40: 17862 + 458 = 18320
Step 41: 18320 + 458 = 18778
Step 42: 18778 + 458 = 19236
Step 43: 19236 + 458 = 19694
Step 44: 19694 + 458 = 20152
Step 45: 20152 + 458 = 20610
Step 46: 20610 + 458 = 21068

So, 458*46 = 21068