Let's roll up our sleeves and solve this. We have 675 and we're going to multiply it by 251, essentially adding 675 to itself 251 times.
Step 1: 0 + 675 = 675
Step 2: 675 + 675 = 1350
Step 3: 1350 + 675 = 2025
Step 4: 2025 + 675 = 2700
Step 5: 2700 + 675 = 3375
Step 6: 3375 + 675 = 4050
Step 7: 4050 + 675 = 4725
Step 8: 4725 + 675 = 5400
Step 9: 5400 + 675 = 6075
Step 10: 6075 + 675 = 6750
Step 11: 6750 + 675 = 7425
Step 12: 7425 + 675 = 8100
Step 13: 8100 + 675 = 8775
Step 14: 8775 + 675 = 9450
Step 15: 9450 + 675 = 10125
Step 16: 10125 + 675 = 10800
Step 17: 10800 + 675 = 11475
Step 18: 11475 + 675 = 12150
Step 19: 12150 + 675 = 12825
Step 20: 12825 + 675 = 13500
Step 21: 13500 + 675 = 14175
Step 22: 14175 + 675 = 14850
Step 23: 14850 + 675 = 15525
Step 24: 15525 + 675 = 16200
Step 25: 16200 + 675 = 16875
Step 26: 16875 + 675 = 17550
Step 27: 17550 + 675 = 18225
Step 28: 18225 + 675 = 18900
Step 29: 18900 + 675 = 19575
Step 30: 19575 + 675 = 20250
Step 31: 20250 + 675 = 20925
Step 32: 20925 + 675 = 21600
Step 33: 21600 + 675 = 22275
Step 34: 22275 + 675 = 22950
Step 35: 22950 + 675 = 23625
Step 36: 23625 + 675 = 24300
Step 37: 24300 + 675 = 24975
Step 38: 24975 + 675 = 25650
Step 39: 25650 + 675 = 26325
Step 40: 26325 + 675 = 27000
Step 41: 27000 + 675 = 27675
Step 42: 27675 + 675 = 28350
Step 43: 28350 + 675 = 29025
Step 44: 29025 + 675 = 29700
Step 45: 29700 + 675 = 30375
Step 46: 30375 + 675 = 31050
Step 47: 31050 + 675 = 31725
Step 48: 31725 + 675 = 32400
Step 49: 32400 + 675 = 33075
Step 50: 33075 + 675 = 33750
Step 51: 33750 + 675 = 34425
Step 52: 34425 + 675 = 35100
Step 53: 35100 + 675 = 35775
Step 54: 35775 + 675 = 36450
Step 55: 36450 + 675 = 37125
Step 56: 37125 + 675 = 37800
Step 57: 37800 + 675 = 38475
Step 58: 38475 + 675 = 39150
Step 59: 39150 + 675 = 39825
Step 60: 39825 + 675 = 40500
Step 61: 40500 + 675 = 41175
Step 62: 41175 + 675 = 41850
Step 63: 41850 + 675 = 42525
Step 64: 42525 + 675 = 43200
Step 65: 43200 + 675 = 43875
Step 66: 43875 + 675 = 44550
Step 67: 44550 + 675 = 45225
Step 68: 45225 + 675 = 45900
Step 69: 45900 + 675 = 46575
Step 70: 46575 + 675 = 47250
Step 71: 47250 + 675 = 47925
Step 72: 47925 + 675 = 48600
Step 73: 48600 + 675 = 49275
Step 74: 49275 + 675 = 49950
Step 75: 49950 + 675 = 50625
Step 76: 50625 + 675 = 51300
Step 77: 51300 + 675 = 51975
Step 78: 51975 + 675 = 52650
Step 79: 52650 + 675 = 53325
Step 80: 53325 + 675 = 54000
Step 81: 54000 + 675 = 54675
Step 82: 54675 + 675 = 55350
Step 83: 55350 + 675 = 56025
Step 84: 56025 + 675 = 56700
Step 85: 56700 + 675 = 57375
Step 86: 57375 + 675 = 58050
Step 87: 58050 + 675 = 58725
Step 88: 58725 + 675 = 59400
Step 89: 59400 + 675 = 60075
Step 90: 60075 + 675 = 60750
Step 91: 60750 + 675 = 61425
Step 92: 61425 + 675 = 62100
Step 93: 62100 + 675 = 62775
Step 94: 62775 + 675 = 63450
Step 95: 63450 + 675 = 64125
Step 96: 64125 + 675 = 64800
Step 97: 64800 + 675 = 65475
Step 98: 65475 + 675 = 66150
Step 99: 66150 + 675 = 66825
Step 100: 66825 + 675 = 67500
Step 101: 67500 + 675 = 68175
Step 102: 68175 + 675 = 68850
Step 103: 68850 + 675 = 69525
Step 104: 69525 + 675 = 70200
Step 105: 70200 + 675 = 70875
Step 106: 70875 + 675 = 71550
Step 107: 71550 + 675 = 72225
Step 108: 72225 + 675 = 72900
Step 109: 72900 + 675 = 73575
Step 110: 73575 + 675 = 74250
Step 111: 74250 + 675 = 74925
Step 112: 74925 + 675 = 75600
Step 113: 75600 + 675 = 76275
Step 114: 76275 + 675 = 76950
Step 115: 76950 + 675 = 77625
Step 116: 77625 + 675 = 78300
Step 117: 78300 + 675 = 78975
Step 118: 78975 + 675 = 79650
Step 119: 79650 + 675 = 80325
Step 120: 80325 + 675 = 81000
Step 121: 81000 + 675 = 81675
Step 122: 81675 + 675 = 82350
Step 123: 82350 + 675 = 83025
Step 124: 83025 + 675 = 83700
Step 125: 83700 + 675 = 84375
Step 126: 84375 + 675 = 85050
Step 127: 85050 + 675 = 85725
Step 128: 85725 + 675 = 86400
Step 129: 86400 + 675 = 87075
Step 130: 87075 + 675 = 87750
Step 131: 87750 + 675 = 88425
Step 132: 88425 + 675 = 89100
Step 133: 89100 + 675 = 89775
Step 134: 89775 + 675 = 90450
Step 135: 90450 + 675 = 91125
Step 136: 91125 + 675 = 91800
Step 137: 91800 + 675 = 92475
Step 138: 92475 + 675 = 93150
Step 139: 93150 + 675 = 93825
Step 140: 93825 + 675 = 94500
Step 141: 94500 + 675 = 95175
Step 142: 95175 + 675 = 95850
Step 143: 95850 + 675 = 96525
Step 144: 96525 + 675 = 97200
Step 145: 97200 + 675 = 97875
Step 146: 97875 + 675 = 98550
Step 147: 98550 + 675 = 99225
Step 148: 99225 + 675 = 99900
Step 149: 99900 + 675 = 100575
Step 150: 100575 + 675 = 101250
Step 151: 101250 + 675 = 101925
Step 152: 101925 + 675 = 102600
Step 153: 102600 + 675 = 103275
Step 154: 103275 + 675 = 103950
Step 155: 103950 + 675 = 104625
Step 156: 104625 + 675 = 105300
Step 157: 105300 + 675 = 105975
Step 158: 105975 + 675 = 106650
Step 159: 106650 + 675 = 107325
Step 160: 107325 + 675 = 108000
Step 161: 108000 + 675 = 108675
Step 162: 108675 + 675 = 109350
Step 163: 109350 + 675 = 110025
Step 164: 110025 + 675 = 110700
Step 165: 110700 + 675 = 111375
Step 166: 111375 + 675 = 112050
Step 167: 112050 + 675 = 112725
Step 168: 112725 + 675 = 113400
Step 169: 113400 + 675 = 114075
Step 170: 114075 + 675 = 114750
Step 171: 114750 + 675 = 115425
Step 172: 115425 + 675 = 116100
Step 173: 116100 + 675 = 116775
Step 174: 116775 + 675 = 117450
Step 175: 117450 + 675 = 118125
Step 176: 118125 + 675 = 118800
Step 177: 118800 + 675 = 119475
Step 178: 119475 + 675 = 120150
Step 179: 120150 + 675 = 120825
Step 180: 120825 + 675 = 121500
Step 181: 121500 + 675 = 122175
Step 182: 122175 + 675 = 122850
Step 183: 122850 + 675 = 123525
Step 184: 123525 + 675 = 124200
Step 185: 124200 + 675 = 124875
Step 186: 124875 + 675 = 125550
Step 187: 125550 + 675 = 126225
Step 188: 126225 + 675 = 126900
Step 189: 126900 + 675 = 127575
Step 190: 127575 + 675 = 128250
Step 191: 128250 + 675 = 128925
Step 192: 128925 + 675 = 129600
Step 193: 129600 + 675 = 130275
Step 194: 130275 + 675 = 130950
Step 195: 130950 + 675 = 131625
Step 196: 131625 + 675 = 132300
Step 197: 132300 + 675 = 132975
Step 198: 132975 + 675 = 133650
Step 199: 133650 + 675 = 134325
Step 200: 134325 + 675 = 135000
Step 201: 135000 + 675 = 135675
Step 202: 135675 + 675 = 136350
Step 203: 136350 + 675 = 137025
Step 204: 137025 + 675 = 137700
Step 205: 137700 + 675 = 138375
Step 206: 138375 + 675 = 139050
Step 207: 139050 + 675 = 139725
Step 208: 139725 + 675 = 140400
Step 209: 140400 + 675 = 141075
Step 210: 141075 + 675 = 141750
Step 211: 141750 + 675 = 142425
Step 212: 142425 + 675 = 143100
Step 213: 143100 + 675 = 143775
Step 214: 143775 + 675 = 144450
Step 215: 144450 + 675 = 145125
Step 216: 145125 + 675 = 145800
Step 217: 145800 + 675 = 146475
Step 218: 146475 + 675 = 147150
Step 219: 147150 + 675 = 147825
Step 220: 147825 + 675 = 148500
Step 221: 148500 + 675 = 149175
Step 222: 149175 + 675 = 149850
Step 223: 149850 + 675 = 150525
Step 224: 150525 + 675 = 151200
Step 225: 151200 + 675 = 151875
Step 226: 151875 + 675 = 152550
Step 227: 152550 + 675 = 153225
Step 228: 153225 + 675 = 153900
Step 229: 153900 + 675 = 154575
Step 230: 154575 + 675 = 155250
Step 231: 155250 + 675 = 155925
Step 232: 155925 + 675 = 156600
Step 233: 156600 + 675 = 157275
Step 234: 157275 + 675 = 157950
Step 235: 157950 + 675 = 158625
Step 236: 158625 + 675 = 159300
Step 237: 159300 + 675 = 159975
Step 238: 159975 + 675 = 160650
Step 239: 160650 + 675 = 161325
Step 240: 161325 + 675 = 162000
Step 241: 162000 + 675 = 162675
Step 242: 162675 + 675 = 163350
Step 243: 163350 + 675 = 164025
Step 244: 164025 + 675 = 164700
Step 245: 164700 + 675 = 165375
Step 246: 165375 + 675 = 166050
Step 247: 166050 + 675 = 166725
Step 248: 166725 + 675 = 167400
Step 249: 167400 + 675 = 168075
Step 250: 168075 + 675 = 168750
Step 251: 168750 + 675 = 169425

So, 675*251 = 169425