OK, let's work through this together. We're starting with 101 and we're going to multiply it by 50, which means we add 101 to itself 50 times.
Step 1: 0 + 101 = 101
Step 2: 101 + 101 = 202
Step 3: 202 + 101 = 303
Step 4: 303 + 101 = 404
Step 5: 404 + 101 = 505
Step 6: 505 + 101 = 606
Step 7: 606 + 101 = 707
Step 8: 707 + 101 = 808
Step 9: 808 + 101 = 909
Step 10: 909 + 101 = 1010
Step 11: 1010 + 101 = 1111
Step 12: 1111 + 101 = 1212
Step 13: 1212 + 101 = 1313
Step 14: 1313 + 101 = 1414
Step 15: 1414 + 101 = 1515
Step 16: 1515 + 101 = 1616
Step 17: 1616 + 101 = 1717
Step 18: 1717 + 101 = 1818
Step 19: 1818 + 101 = 1919
Step 20: 1919 + 101 = 2020
Step 21: 2020 + 101 = 2121
Step 22: 2121 + 101 = 2222
Step 23: 2222 + 101 = 2323
Step 24: 2323 + 101 = 2424
Step 25: 2424 + 101 = 2525
Step 26: 2525 + 101 = 2626
Step 27: 2626 + 101 = 2727
Step 28: 2727 + 101 = 2828
Step 29: 2828 + 101 = 2929
Step 30: 2929 + 101 = 3030
Step 31: 3030 + 101 = 3131
Step 32: 3131 + 101 = 3232
Step 33: 3232 + 101 = 3333
Step 34: 3333 + 101 = 3434
Step 35: 3434 + 101 = 3535
Step 36: 3535 + 101 = 3636
Step 37: 3636 + 101 = 3737
Step 38: 3737 + 101 = 3838
Step 39: 3838 + 101 = 3939
Step 40: 3939 + 101 = 4040
Step 41: 4040 + 101 = 4141
Step 42: 4141 + 101 = 4242
Step 43: 4242 + 101 = 4343
Step 44: 4343 + 101 = 4444
Step 45: 4444 + 101 = 4545
Step 46: 4545 + 101 = 4646
Step 47: 4646 + 101 = 4747
Step 48: 4747 + 101 = 4848
Step 49: 4848 + 101 = 4949
Step 50: 4949 + 101 = 5050

So, 101*50 = 5050