Without delay, let's solve this. We've got 875 and we will be multiplying it by 49, that is, adding 875 to itself 49 times.
Step 1: 0 + 875 = 875
Step 2: 875 + 875 = 1750
Step 3: 1750 + 875 = 2625
Step 4: 2625 + 875 = 3500
Step 5: 3500 + 875 = 4375
Step 6: 4375 + 875 = 5250
Step 7: 5250 + 875 = 6125
Step 8: 6125 + 875 = 7000
Step 9: 7000 + 875 = 7875
Step 10: 7875 + 875 = 8750
Step 11: 8750 + 875 = 9625
Step 12: 9625 + 875 = 10500
Step 13: 10500 + 875 = 11375
Step 14: 11375 + 875 = 12250
Step 15: 12250 + 875 = 13125
Step 16: 13125 + 875 = 14000
Step 17: 14000 + 875 = 14875
Step 18: 14875 + 875 = 15750
Step 19: 15750 + 875 = 16625
Step 20: 16625 + 875 = 17500
Step 21: 17500 + 875 = 18375
Step 22: 18375 + 875 = 19250
Step 23: 19250 + 875 = 20125
Step 24: 20125 + 875 = 21000
Step 25: 21000 + 875 = 21875
Step 26: 21875 + 875 = 22750
Step 27: 22750 + 875 = 23625
Step 28: 23625 + 875 = 24500
Step 29: 24500 + 875 = 25375
Step 30: 25375 + 875 = 26250
Step 31: 26250 + 875 = 27125
Step 32: 27125 + 875 = 28000
Step 33: 28000 + 875 = 28875
Step 34: 28875 + 875 = 29750
Step 35: 29750 + 875 = 30625
Step 36: 30625 + 875 = 31500
Step 37: 31500 + 875 = 32375
Step 38: 32375 + 875 = 33250
Step 39: 33250 + 875 = 34125
Step 40: 34125 + 875 = 35000
Step 41: 35000 + 875 = 35875
Step 42: 35875 + 875 = 36750
Step 43: 36750 + 875 = 37625
Step 44: 37625 + 875 = 38500
Step 45: 38500 + 875 = 39375
Step 46: 39375 + 875 = 40250
Step 47: 40250 + 875 = 41125
Step 48: 41125 + 875 = 42000
Step 49: 42000 + 875 = 42875

So, 875*49 = 42875