OK, let's work through this together. We're starting with 626 and we're going to multiply it by 50, which means we add 626 to itself 50 times.
Step 1: 0 + 626 = 626
Step 2: 626 + 626 = 1252
Step 3: 1252 + 626 = 1878
Step 4: 1878 + 626 = 2504
Step 5: 2504 + 626 = 3130
Step 6: 3130 + 626 = 3756
Step 7: 3756 + 626 = 4382
Step 8: 4382 + 626 = 5008
Step 9: 5008 + 626 = 5634
Step 10: 5634 + 626 = 6260
Step 11: 6260 + 626 = 6886
Step 12: 6886 + 626 = 7512
Step 13: 7512 + 626 = 8138
Step 14: 8138 + 626 = 8764
Step 15: 8764 + 626 = 9390
Step 16: 9390 + 626 = 10016
Step 17: 10016 + 626 = 10642
Step 18: 10642 + 626 = 11268
Step 19: 11268 + 626 = 11894
Step 20: 11894 + 626 = 12520
Step 21: 12520 + 626 = 13146
Step 22: 13146 + 626 = 13772
Step 23: 13772 + 626 = 14398
Step 24: 14398 + 626 = 15024
Step 25: 15024 + 626 = 15650
Step 26: 15650 + 626 = 16276
Step 27: 16276 + 626 = 16902
Step 28: 16902 + 626 = 17528
Step 29: 17528 + 626 = 18154
Step 30: 18154 + 626 = 18780
Step 31: 18780 + 626 = 19406
Step 32: 19406 + 626 = 20032
Step 33: 20032 + 626 = 20658
Step 34: 20658 + 626 = 21284
Step 35: 21284 + 626 = 21910
Step 36: 21910 + 626 = 22536
Step 37: 22536 + 626 = 23162
Step 38: 23162 + 626 = 23788
Step 39: 23788 + 626 = 24414
Step 40: 24414 + 626 = 25040
Step 41: 25040 + 626 = 25666
Step 42: 25666 + 626 = 26292
Step 43: 26292 + 626 = 26918
Step 44: 26918 + 626 = 27544
Step 45: 27544 + 626 = 28170
Step 46: 28170 + 626 = 28796
Step 47: 28796 + 626 = 29422
Step 48: 29422 + 626 = 30048
Step 49: 30048 + 626 = 30674
Step 50: 30674 + 626 = 31300

So, 626*50 = 31300