Alright, let's solve this math problem step by step. First, we have the number 505. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 86. So, we're going to take the number 505 and add it to itself 86 times.
Step 1: 0 + 505 = 505
Step 2: 505 + 505 = 1010
Step 3: 1010 + 505 = 1515
Step 4: 1515 + 505 = 2020
Step 5: 2020 + 505 = 2525
Step 6: 2525 + 505 = 3030
Step 7: 3030 + 505 = 3535
Step 8: 3535 + 505 = 4040
Step 9: 4040 + 505 = 4545
Step 10: 4545 + 505 = 5050
Step 11: 5050 + 505 = 5555
Step 12: 5555 + 505 = 6060
Step 13: 6060 + 505 = 6565
Step 14: 6565 + 505 = 7070
Step 15: 7070 + 505 = 7575
Step 16: 7575 + 505 = 8080
Step 17: 8080 + 505 = 8585
Step 18: 8585 + 505 = 9090
Step 19: 9090 + 505 = 9595
Step 20: 9595 + 505 = 10100
Step 21: 10100 + 505 = 10605
Step 22: 10605 + 505 = 11110
Step 23: 11110 + 505 = 11615
Step 24: 11615 + 505 = 12120
Step 25: 12120 + 505 = 12625
Step 26: 12625 + 505 = 13130
Step 27: 13130 + 505 = 13635
Step 28: 13635 + 505 = 14140
Step 29: 14140 + 505 = 14645
Step 30: 14645 + 505 = 15150
Step 31: 15150 + 505 = 15655
Step 32: 15655 + 505 = 16160
Step 33: 16160 + 505 = 16665
Step 34: 16665 + 505 = 17170
Step 35: 17170 + 505 = 17675
Step 36: 17675 + 505 = 18180
Step 37: 18180 + 505 = 18685
Step 38: 18685 + 505 = 19190
Step 39: 19190 + 505 = 19695
Step 40: 19695 + 505 = 20200
Step 41: 20200 + 505 = 20705
Step 42: 20705 + 505 = 21210
Step 43: 21210 + 505 = 21715
Step 44: 21715 + 505 = 22220
Step 45: 22220 + 505 = 22725
Step 46: 22725 + 505 = 23230
Step 47: 23230 + 505 = 23735
Step 48: 23735 + 505 = 24240
Step 49: 24240 + 505 = 24745
Step 50: 24745 + 505 = 25250
Step 51: 25250 + 505 = 25755
Step 52: 25755 + 505 = 26260
Step 53: 26260 + 505 = 26765
Step 54: 26765 + 505 = 27270
Step 55: 27270 + 505 = 27775
Step 56: 27775 + 505 = 28280
Step 57: 28280 + 505 = 28785
Step 58: 28785 + 505 = 29290
Step 59: 29290 + 505 = 29795
Step 60: 29795 + 505 = 30300
Step 61: 30300 + 505 = 30805
Step 62: 30805 + 505 = 31310
Step 63: 31310 + 505 = 31815
Step 64: 31815 + 505 = 32320
Step 65: 32320 + 505 = 32825
Step 66: 32825 + 505 = 33330
Step 67: 33330 + 505 = 33835
Step 68: 33835 + 505 = 34340
Step 69: 34340 + 505 = 34845
Step 70: 34845 + 505 = 35350
Step 71: 35350 + 505 = 35855
Step 72: 35855 + 505 = 36360
Step 73: 36360 + 505 = 36865
Step 74: 36865 + 505 = 37370
Step 75: 37370 + 505 = 37875
Step 76: 37875 + 505 = 38380
Step 77: 38380 + 505 = 38885
Step 78: 38885 + 505 = 39390
Step 79: 39390 + 505 = 39895
Step 80: 39895 + 505 = 40400
Step 81: 40400 + 505 = 40905
Step 82: 40905 + 505 = 41410
Step 83: 41410 + 505 = 41915
Step 84: 41915 + 505 = 42420
Step 85: 42420 + 505 = 42925
Step 86: 42925 + 505 = 43430

So, 505*86 = 43430