OK, let's crack this. We're given 725 and our task is to multiply it by 48. Essentially, we'll be adding 725 to itself 48 times.
Step 1: 0 + 725 = 725
Step 2: 725 + 725 = 1450
Step 3: 1450 + 725 = 2175
Step 4: 2175 + 725 = 2900
Step 5: 2900 + 725 = 3625
Step 6: 3625 + 725 = 4350
Step 7: 4350 + 725 = 5075
Step 8: 5075 + 725 = 5800
Step 9: 5800 + 725 = 6525
Step 10: 6525 + 725 = 7250
Step 11: 7250 + 725 = 7975
Step 12: 7975 + 725 = 8700
Step 13: 8700 + 725 = 9425
Step 14: 9425 + 725 = 10150
Step 15: 10150 + 725 = 10875
Step 16: 10875 + 725 = 11600
Step 17: 11600 + 725 = 12325
Step 18: 12325 + 725 = 13050
Step 19: 13050 + 725 = 13775
Step 20: 13775 + 725 = 14500
Step 21: 14500 + 725 = 15225
Step 22: 15225 + 725 = 15950
Step 23: 15950 + 725 = 16675
Step 24: 16675 + 725 = 17400
Step 25: 17400 + 725 = 18125
Step 26: 18125 + 725 = 18850
Step 27: 18850 + 725 = 19575
Step 28: 19575 + 725 = 20300
Step 29: 20300 + 725 = 21025
Step 30: 21025 + 725 = 21750
Step 31: 21750 + 725 = 22475
Step 32: 22475 + 725 = 23200
Step 33: 23200 + 725 = 23925
Step 34: 23925 + 725 = 24650
Step 35: 24650 + 725 = 25375
Step 36: 25375 + 725 = 26100
Step 37: 26100 + 725 = 26825
Step 38: 26825 + 725 = 27550
Step 39: 27550 + 725 = 28275
Step 40: 28275 + 725 = 29000
Step 41: 29000 + 725 = 29725
Step 42: 29725 + 725 = 30450
Step 43: 30450 + 725 = 31175
Step 44: 31175 + 725 = 31900
Step 45: 31900 + 725 = 32625
Step 46: 32625 + 725 = 33350
Step 47: 33350 + 725 = 34075
Step 48: 34075 + 725 = 34800

So, 725*48 = 34800