Alright, let's solve this math problem step by step. First, we have the number 25. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 154. So, we're going to take the number 25 and add it to itself 154 times.
Step 1: 0 + 25 = 25
Step 2: 25 + 25 = 50
Step 3: 50 + 25 = 75
Step 4: 75 + 25 = 100
Step 5: 100 + 25 = 125
Step 6: 125 + 25 = 150
Step 7: 150 + 25 = 175
Step 8: 175 + 25 = 200
Step 9: 200 + 25 = 225
Step 10: 225 + 25 = 250
Step 11: 250 + 25 = 275
Step 12: 275 + 25 = 300
Step 13: 300 + 25 = 325
Step 14: 325 + 25 = 350
Step 15: 350 + 25 = 375
Step 16: 375 + 25 = 400
Step 17: 400 + 25 = 425
Step 18: 425 + 25 = 450
Step 19: 450 + 25 = 475
Step 20: 475 + 25 = 500
Step 21: 500 + 25 = 525
Step 22: 525 + 25 = 550
Step 23: 550 + 25 = 575
Step 24: 575 + 25 = 600
Step 25: 600 + 25 = 625
Step 26: 625 + 25 = 650
Step 27: 650 + 25 = 675
Step 28: 675 + 25 = 700
Step 29: 700 + 25 = 725
Step 30: 725 + 25 = 750
Step 31: 750 + 25 = 775
Step 32: 775 + 25 = 800
Step 33: 800 + 25 = 825
Step 34: 825 + 25 = 850
Step 35: 850 + 25 = 875
Step 36: 875 + 25 = 900
Step 37: 900 + 25 = 925
Step 38: 925 + 25 = 950
Step 39: 950 + 25 = 975
Step 40: 975 + 25 = 1000
Step 41: 1000 + 25 = 1025
Step 42: 1025 + 25 = 1050
Step 43: 1050 + 25 = 1075
Step 44: 1075 + 25 = 1100
Step 45: 1100 + 25 = 1125
Step 46: 1125 + 25 = 1150
Step 47: 1150 + 25 = 1175
Step 48: 1175 + 25 = 1200
Step 49: 1200 + 25 = 1225
Step 50: 1225 + 25 = 1250
Step 51: 1250 + 25 = 1275
Step 52: 1275 + 25 = 1300
Step 53: 1300 + 25 = 1325
Step 54: 1325 + 25 = 1350
Step 55: 1350 + 25 = 1375
Step 56: 1375 + 25 = 1400
Step 57: 1400 + 25 = 1425
Step 58: 1425 + 25 = 1450
Step 59: 1450 + 25 = 1475
Step 60: 1475 + 25 = 1500
Step 61: 1500 + 25 = 1525
Step 62: 1525 + 25 = 1550
Step 63: 1550 + 25 = 1575
Step 64: 1575 + 25 = 1600
Step 65: 1600 + 25 = 1625
Step 66: 1625 + 25 = 1650
Step 67: 1650 + 25 = 1675
Step 68: 1675 + 25 = 1700
Step 69: 1700 + 25 = 1725
Step 70: 1725 + 25 = 1750
Step 71: 1750 + 25 = 1775
Step 72: 1775 + 25 = 1800
Step 73: 1800 + 25 = 1825
Step 74: 1825 + 25 = 1850
Step 75: 1850 + 25 = 1875
Step 76: 1875 + 25 = 1900
Step 77: 1900 + 25 = 1925
Step 78: 1925 + 25 = 1950
Step 79: 1950 + 25 = 1975
Step 80: 1975 + 25 = 2000
Step 81: 2000 + 25 = 2025
Step 82: 2025 + 25 = 2050
Step 83: 2050 + 25 = 2075
Step 84: 2075 + 25 = 2100
Step 85: 2100 + 25 = 2125
Step 86: 2125 + 25 = 2150
Step 87: 2150 + 25 = 2175
Step 88: 2175 + 25 = 2200
Step 89: 2200 + 25 = 2225
Step 90: 2225 + 25 = 2250
Step 91: 2250 + 25 = 2275
Step 92: 2275 + 25 = 2300
Step 93: 2300 + 25 = 2325
Step 94: 2325 + 25 = 2350
Step 95: 2350 + 25 = 2375
Step 96: 2375 + 25 = 2400
Step 97: 2400 + 25 = 2425
Step 98: 2425 + 25 = 2450
Step 99: 2450 + 25 = 2475
Step 100: 2475 + 25 = 2500
Step 101: 2500 + 25 = 2525
Step 102: 2525 + 25 = 2550
Step 103: 2550 + 25 = 2575
Step 104: 2575 + 25 = 2600
Step 105: 2600 + 25 = 2625
Step 106: 2625 + 25 = 2650
Step 107: 2650 + 25 = 2675
Step 108: 2675 + 25 = 2700
Step 109: 2700 + 25 = 2725
Step 110: 2725 + 25 = 2750
Step 111: 2750 + 25 = 2775
Step 112: 2775 + 25 = 2800
Step 113: 2800 + 25 = 2825
Step 114: 2825 + 25 = 2850
Step 115: 2850 + 25 = 2875
Step 116: 2875 + 25 = 2900
Step 117: 2900 + 25 = 2925
Step 118: 2925 + 25 = 2950
Step 119: 2950 + 25 = 2975
Step 120: 2975 + 25 = 3000
Step 121: 3000 + 25 = 3025
Step 122: 3025 + 25 = 3050
Step 123: 3050 + 25 = 3075
Step 124: 3075 + 25 = 3100
Step 125: 3100 + 25 = 3125
Step 126: 3125 + 25 = 3150
Step 127: 3150 + 25 = 3175
Step 128: 3175 + 25 = 3200
Step 129: 3200 + 25 = 3225
Step 130: 3225 + 25 = 3250
Step 131: 3250 + 25 = 3275
Step 132: 3275 + 25 = 3300
Step 133: 3300 + 25 = 3325
Step 134: 3325 + 25 = 3350
Step 135: 3350 + 25 = 3375
Step 136: 3375 + 25 = 3400
Step 137: 3400 + 25 = 3425
Step 138: 3425 + 25 = 3450
Step 139: 3450 + 25 = 3475
Step 140: 3475 + 25 = 3500
Step 141: 3500 + 25 = 3525
Step 142: 3525 + 25 = 3550
Step 143: 3550 + 25 = 3575
Step 144: 3575 + 25 = 3600
Step 145: 3600 + 25 = 3625
Step 146: 3625 + 25 = 3650
Step 147: 3650 + 25 = 3675
Step 148: 3675 + 25 = 3700
Step 149: 3700 + 25 = 3725
Step 150: 3725 + 25 = 3750
Step 151: 3750 + 25 = 3775
Step 152: 3775 + 25 = 3800
Step 153: 3800 + 25 = 3825
Step 154: 3825 + 25 = 3850

So, 25*154 = 3850