Let's get this math done. We have 518 and we're going to multiply it by 49. This is the same as taking 518 and adding it to itself 49 times.
Step 1: 0 + 518 = 518
Step 2: 518 + 518 = 1036
Step 3: 1036 + 518 = 1554
Step 4: 1554 + 518 = 2072
Step 5: 2072 + 518 = 2590
Step 6: 2590 + 518 = 3108
Step 7: 3108 + 518 = 3626
Step 8: 3626 + 518 = 4144
Step 9: 4144 + 518 = 4662
Step 10: 4662 + 518 = 5180
Step 11: 5180 + 518 = 5698
Step 12: 5698 + 518 = 6216
Step 13: 6216 + 518 = 6734
Step 14: 6734 + 518 = 7252
Step 15: 7252 + 518 = 7770
Step 16: 7770 + 518 = 8288
Step 17: 8288 + 518 = 8806
Step 18: 8806 + 518 = 9324
Step 19: 9324 + 518 = 9842
Step 20: 9842 + 518 = 10360
Step 21: 10360 + 518 = 10878
Step 22: 10878 + 518 = 11396
Step 23: 11396 + 518 = 11914
Step 24: 11914 + 518 = 12432
Step 25: 12432 + 518 = 12950
Step 26: 12950 + 518 = 13468
Step 27: 13468 + 518 = 13986
Step 28: 13986 + 518 = 14504
Step 29: 14504 + 518 = 15022
Step 30: 15022 + 518 = 15540
Step 31: 15540 + 518 = 16058
Step 32: 16058 + 518 = 16576
Step 33: 16576 + 518 = 17094
Step 34: 17094 + 518 = 17612
Step 35: 17612 + 518 = 18130
Step 36: 18130 + 518 = 18648
Step 37: 18648 + 518 = 19166
Step 38: 19166 + 518 = 19684
Step 39: 19684 + 518 = 20202
Step 40: 20202 + 518 = 20720
Step 41: 20720 + 518 = 21238
Step 42: 21238 + 518 = 21756
Step 43: 21756 + 518 = 22274
Step 44: 22274 + 518 = 22792
Step 45: 22792 + 518 = 23310
Step 46: 23310 + 518 = 23828
Step 47: 23828 + 518 = 24346
Step 48: 24346 + 518 = 24864
Step 49: 24864 + 518 = 25382

So, 518*49 = 25382