Alright, let's solve this math problem step by step. First, we have the number 285. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 51. So, we're going to take the number 285 and add it to itself 51 times.
Step 1: 0 + 285 = 285
Step 2: 285 + 285 = 570
Step 3: 570 + 285 = 855
Step 4: 855 + 285 = 1140
Step 5: 1140 + 285 = 1425
Step 6: 1425 + 285 = 1710
Step 7: 1710 + 285 = 1995
Step 8: 1995 + 285 = 2280
Step 9: 2280 + 285 = 2565
Step 10: 2565 + 285 = 2850
Step 11: 2850 + 285 = 3135
Step 12: 3135 + 285 = 3420
Step 13: 3420 + 285 = 3705
Step 14: 3705 + 285 = 3990
Step 15: 3990 + 285 = 4275
Step 16: 4275 + 285 = 4560
Step 17: 4560 + 285 = 4845
Step 18: 4845 + 285 = 5130
Step 19: 5130 + 285 = 5415
Step 20: 5415 + 285 = 5700
Step 21: 5700 + 285 = 5985
Step 22: 5985 + 285 = 6270
Step 23: 6270 + 285 = 6555
Step 24: 6555 + 285 = 6840
Step 25: 6840 + 285 = 7125
Step 26: 7125 + 285 = 7410
Step 27: 7410 + 285 = 7695
Step 28: 7695 + 285 = 7980
Step 29: 7980 + 285 = 8265
Step 30: 8265 + 285 = 8550
Step 31: 8550 + 285 = 8835
Step 32: 8835 + 285 = 9120
Step 33: 9120 + 285 = 9405
Step 34: 9405 + 285 = 9690
Step 35: 9690 + 285 = 9975
Step 36: 9975 + 285 = 10260
Step 37: 10260 + 285 = 10545
Step 38: 10545 + 285 = 10830
Step 39: 10830 + 285 = 11115
Step 40: 11115 + 285 = 11400
Step 41: 11400 + 285 = 11685
Step 42: 11685 + 285 = 11970
Step 43: 11970 + 285 = 12255
Step 44: 12255 + 285 = 12540
Step 45: 12540 + 285 = 12825
Step 46: 12825 + 285 = 13110
Step 47: 13110 + 285 = 13395
Step 48: 13395 + 285 = 13680
Step 49: 13680 + 285 = 13965
Step 50: 13965 + 285 = 14250
Step 51: 14250 + 285 = 14535

So, 285*51 = 14535