Let's get this math done. We have 525 and we're going to multiply it by 48. This is the same as taking 525 and adding it to itself 48 times.
Step 1: 0 + 525 = 525
Step 2: 525 + 525 = 1050
Step 3: 1050 + 525 = 1575
Step 4: 1575 + 525 = 2100
Step 5: 2100 + 525 = 2625
Step 6: 2625 + 525 = 3150
Step 7: 3150 + 525 = 3675
Step 8: 3675 + 525 = 4200
Step 9: 4200 + 525 = 4725
Step 10: 4725 + 525 = 5250
Step 11: 5250 + 525 = 5775
Step 12: 5775 + 525 = 6300
Step 13: 6300 + 525 = 6825
Step 14: 6825 + 525 = 7350
Step 15: 7350 + 525 = 7875
Step 16: 7875 + 525 = 8400
Step 17: 8400 + 525 = 8925
Step 18: 8925 + 525 = 9450
Step 19: 9450 + 525 = 9975
Step 20: 9975 + 525 = 10500
Step 21: 10500 + 525 = 11025
Step 22: 11025 + 525 = 11550
Step 23: 11550 + 525 = 12075
Step 24: 12075 + 525 = 12600
Step 25: 12600 + 525 = 13125
Step 26: 13125 + 525 = 13650
Step 27: 13650 + 525 = 14175
Step 28: 14175 + 525 = 14700
Step 29: 14700 + 525 = 15225
Step 30: 15225 + 525 = 15750
Step 31: 15750 + 525 = 16275
Step 32: 16275 + 525 = 16800
Step 33: 16800 + 525 = 17325
Step 34: 17325 + 525 = 17850
Step 35: 17850 + 525 = 18375
Step 36: 18375 + 525 = 18900
Step 37: 18900 + 525 = 19425
Step 38: 19425 + 525 = 19950
Step 39: 19950 + 525 = 20475
Step 40: 20475 + 525 = 21000
Step 41: 21000 + 525 = 21525
Step 42: 21525 + 525 = 22050
Step 43: 22050 + 525 = 22575
Step 44: 22575 + 525 = 23100
Step 45: 23100 + 525 = 23625
Step 46: 23625 + 525 = 24150
Step 47: 24150 + 525 = 24675
Step 48: 24675 + 525 = 25200

So, 525*48 = 25200