Let's roll up our sleeves and solve this. We have 625 and we're going to multiply it by 273, essentially adding 625 to itself 273 times.
Step 1: 0 + 625 = 625
Step 2: 625 + 625 = 1250
Step 3: 1250 + 625 = 1875
Step 4: 1875 + 625 = 2500
Step 5: 2500 + 625 = 3125
Step 6: 3125 + 625 = 3750
Step 7: 3750 + 625 = 4375
Step 8: 4375 + 625 = 5000
Step 9: 5000 + 625 = 5625
Step 10: 5625 + 625 = 6250
Step 11: 6250 + 625 = 6875
Step 12: 6875 + 625 = 7500
Step 13: 7500 + 625 = 8125
Step 14: 8125 + 625 = 8750
Step 15: 8750 + 625 = 9375
Step 16: 9375 + 625 = 10000
Step 17: 10000 + 625 = 10625
Step 18: 10625 + 625 = 11250
Step 19: 11250 + 625 = 11875
Step 20: 11875 + 625 = 12500
Step 21: 12500 + 625 = 13125
Step 22: 13125 + 625 = 13750
Step 23: 13750 + 625 = 14375
Step 24: 14375 + 625 = 15000
Step 25: 15000 + 625 = 15625
Step 26: 15625 + 625 = 16250
Step 27: 16250 + 625 = 16875
Step 28: 16875 + 625 = 17500
Step 29: 17500 + 625 = 18125
Step 30: 18125 + 625 = 18750
Step 31: 18750 + 625 = 19375
Step 32: 19375 + 625 = 20000
Step 33: 20000 + 625 = 20625
Step 34: 20625 + 625 = 21250
Step 35: 21250 + 625 = 21875
Step 36: 21875 + 625 = 22500
Step 37: 22500 + 625 = 23125
Step 38: 23125 + 625 = 23750
Step 39: 23750 + 625 = 24375
Step 40: 24375 + 625 = 25000
Step 41: 25000 + 625 = 25625
Step 42: 25625 + 625 = 26250
Step 43: 26250 + 625 = 26875
Step 44: 26875 + 625 = 27500
Step 45: 27500 + 625 = 28125
Step 46: 28125 + 625 = 28750
Step 47: 28750 + 625 = 29375
Step 48: 29375 + 625 = 30000
Step 49: 30000 + 625 = 30625
Step 50: 30625 + 625 = 31250
Step 51: 31250 + 625 = 31875
Step 52: 31875 + 625 = 32500
Step 53: 32500 + 625 = 33125
Step 54: 33125 + 625 = 33750
Step 55: 33750 + 625 = 34375
Step 56: 34375 + 625 = 35000
Step 57: 35000 + 625 = 35625
Step 58: 35625 + 625 = 36250
Step 59: 36250 + 625 = 36875
Step 60: 36875 + 625 = 37500
Step 61: 37500 + 625 = 38125
Step 62: 38125 + 625 = 38750
Step 63: 38750 + 625 = 39375
Step 64: 39375 + 625 = 40000
Step 65: 40000 + 625 = 40625
Step 66: 40625 + 625 = 41250
Step 67: 41250 + 625 = 41875
Step 68: 41875 + 625 = 42500
Step 69: 42500 + 625 = 43125
Step 70: 43125 + 625 = 43750
Step 71: 43750 + 625 = 44375
Step 72: 44375 + 625 = 45000
Step 73: 45000 + 625 = 45625
Step 74: 45625 + 625 = 46250
Step 75: 46250 + 625 = 46875
Step 76: 46875 + 625 = 47500
Step 77: 47500 + 625 = 48125
Step 78: 48125 + 625 = 48750
Step 79: 48750 + 625 = 49375
Step 80: 49375 + 625 = 50000
Step 81: 50000 + 625 = 50625
Step 82: 50625 + 625 = 51250
Step 83: 51250 + 625 = 51875
Step 84: 51875 + 625 = 52500
Step 85: 52500 + 625 = 53125
Step 86: 53125 + 625 = 53750
Step 87: 53750 + 625 = 54375
Step 88: 54375 + 625 = 55000
Step 89: 55000 + 625 = 55625
Step 90: 55625 + 625 = 56250
Step 91: 56250 + 625 = 56875
Step 92: 56875 + 625 = 57500
Step 93: 57500 + 625 = 58125
Step 94: 58125 + 625 = 58750
Step 95: 58750 + 625 = 59375
Step 96: 59375 + 625 = 60000
Step 97: 60000 + 625 = 60625
Step 98: 60625 + 625 = 61250
Step 99: 61250 + 625 = 61875
Step 100: 61875 + 625 = 62500
Step 101: 62500 + 625 = 63125
Step 102: 63125 + 625 = 63750
Step 103: 63750 + 625 = 64375
Step 104: 64375 + 625 = 65000
Step 105: 65000 + 625 = 65625
Step 106: 65625 + 625 = 66250
Step 107: 66250 + 625 = 66875
Step 108: 66875 + 625 = 67500
Step 109: 67500 + 625 = 68125
Step 110: 68125 + 625 = 68750
Step 111: 68750 + 625 = 69375
Step 112: 69375 + 625 = 70000
Step 113: 70000 + 625 = 70625
Step 114: 70625 + 625 = 71250
Step 115: 71250 + 625 = 71875
Step 116: 71875 + 625 = 72500
Step 117: 72500 + 625 = 73125
Step 118: 73125 + 625 = 73750
Step 119: 73750 + 625 = 74375
Step 120: 74375 + 625 = 75000
Step 121: 75000 + 625 = 75625
Step 122: 75625 + 625 = 76250
Step 123: 76250 + 625 = 76875
Step 124: 76875 + 625 = 77500
Step 125: 77500 + 625 = 78125
Step 126: 78125 + 625 = 78750
Step 127: 78750 + 625 = 79375
Step 128: 79375 + 625 = 80000
Step 129: 80000 + 625 = 80625
Step 130: 80625 + 625 = 81250
Step 131: 81250 + 625 = 81875
Step 132: 81875 + 625 = 82500
Step 133: 82500 + 625 = 83125
Step 134: 83125 + 625 = 83750
Step 135: 83750 + 625 = 84375
Step 136: 84375 + 625 = 85000
Step 137: 85000 + 625 = 85625
Step 138: 85625 + 625 = 86250
Step 139: 86250 + 625 = 86875
Step 140: 86875 + 625 = 87500
Step 141: 87500 + 625 = 88125
Step 142: 88125 + 625 = 88750
Step 143: 88750 + 625 = 89375
Step 144: 89375 + 625 = 90000
Step 145: 90000 + 625 = 90625
Step 146: 90625 + 625 = 91250
Step 147: 91250 + 625 = 91875
Step 148: 91875 + 625 = 92500
Step 149: 92500 + 625 = 93125
Step 150: 93125 + 625 = 93750
Step 151: 93750 + 625 = 94375
Step 152: 94375 + 625 = 95000
Step 153: 95000 + 625 = 95625
Step 154: 95625 + 625 = 96250
Step 155: 96250 + 625 = 96875
Step 156: 96875 + 625 = 97500
Step 157: 97500 + 625 = 98125
Step 158: 98125 + 625 = 98750
Step 159: 98750 + 625 = 99375
Step 160: 99375 + 625 = 100000
Step 161: 100000 + 625 = 100625
Step 162: 100625 + 625 = 101250
Step 163: 101250 + 625 = 101875
Step 164: 101875 + 625 = 102500
Step 165: 102500 + 625 = 103125
Step 166: 103125 + 625 = 103750
Step 167: 103750 + 625 = 104375
Step 168: 104375 + 625 = 105000
Step 169: 105000 + 625 = 105625
Step 170: 105625 + 625 = 106250
Step 171: 106250 + 625 = 106875
Step 172: 106875 + 625 = 107500
Step 173: 107500 + 625 = 108125
Step 174: 108125 + 625 = 108750
Step 175: 108750 + 625 = 109375
Step 176: 109375 + 625 = 110000
Step 177: 110000 + 625 = 110625
Step 178: 110625 + 625 = 111250
Step 179: 111250 + 625 = 111875
Step 180: 111875 + 625 = 112500
Step 181: 112500 + 625 = 113125
Step 182: 113125 + 625 = 113750
Step 183: 113750 + 625 = 114375
Step 184: 114375 + 625 = 115000
Step 185: 115000 + 625 = 115625
Step 186: 115625 + 625 = 116250
Step 187: 116250 + 625 = 116875
Step 188: 116875 + 625 = 117500
Step 189: 117500 + 625 = 118125
Step 190: 118125 + 625 = 118750
Step 191: 118750 + 625 = 119375
Step 192: 119375 + 625 = 120000
Step 193: 120000 + 625 = 120625
Step 194: 120625 + 625 = 121250
Step 195: 121250 + 625 = 121875
Step 196: 121875 + 625 = 122500
Step 197: 122500 + 625 = 123125
Step 198: 123125 + 625 = 123750
Step 199: 123750 + 625 = 124375
Step 200: 124375 + 625 = 125000
Step 201: 125000 + 625 = 125625
Step 202: 125625 + 625 = 126250
Step 203: 126250 + 625 = 126875
Step 204: 126875 + 625 = 127500
Step 205: 127500 + 625 = 128125
Step 206: 128125 + 625 = 128750
Step 207: 128750 + 625 = 129375
Step 208: 129375 + 625 = 130000
Step 209: 130000 + 625 = 130625
Step 210: 130625 + 625 = 131250
Step 211: 131250 + 625 = 131875
Step 212: 131875 + 625 = 132500
Step 213: 132500 + 625 = 133125
Step 214: 133125 + 625 = 133750
Step 215: 133750 + 625 = 134375
Step 216: 134375 + 625 = 135000
Step 217: 135000 + 625 = 135625
Step 218: 135625 + 625 = 136250
Step 219: 136250 + 625 = 136875
Step 220: 136875 + 625 = 137500
Step 221: 137500 + 625 = 138125
Step 222: 138125 + 625 = 138750
Step 223: 138750 + 625 = 139375
Step 224: 139375 + 625 = 140000
Step 225: 140000 + 625 = 140625
Step 226: 140625 + 625 = 141250
Step 227: 141250 + 625 = 141875
Step 228: 141875 + 625 = 142500
Step 229: 142500 + 625 = 143125
Step 230: 143125 + 625 = 143750
Step 231: 143750 + 625 = 144375
Step 232: 144375 + 625 = 145000
Step 233: 145000 + 625 = 145625
Step 234: 145625 + 625 = 146250
Step 235: 146250 + 625 = 146875
Step 236: 146875 + 625 = 147500
Step 237: 147500 + 625 = 148125
Step 238: 148125 + 625 = 148750
Step 239: 148750 + 625 = 149375
Step 240: 149375 + 625 = 150000
Step 241: 150000 + 625 = 150625
Step 242: 150625 + 625 = 151250
Step 243: 151250 + 625 = 151875
Step 244: 151875 + 625 = 152500
Step 245: 152500 + 625 = 153125
Step 246: 153125 + 625 = 153750
Step 247: 153750 + 625 = 154375
Step 248: 154375 + 625 = 155000
Step 249: 155000 + 625 = 155625
Step 250: 155625 + 625 = 156250
Step 251: 156250 + 625 = 156875
Step 252: 156875 + 625 = 157500
Step 253: 157500 + 625 = 158125
Step 254: 158125 + 625 = 158750
Step 255: 158750 + 625 = 159375
Step 256: 159375 + 625 = 160000
Step 257: 160000 + 625 = 160625
Step 258: 160625 + 625 = 161250
Step 259: 161250 + 625 = 161875
Step 260: 161875 + 625 = 162500
Step 261: 162500 + 625 = 163125
Step 262: 163125 + 625 = 163750
Step 263: 163750 + 625 = 164375
Step 264: 164375 + 625 = 165000
Step 265: 165000 + 625 = 165625
Step 266: 165625 + 625 = 166250
Step 267: 166250 + 625 = 166875
Step 268: 166875 + 625 = 167500
Step 269: 167500 + 625 = 168125
Step 270: 168125 + 625 = 168750
Step 271: 168750 + 625 = 169375
Step 272: 169375 + 625 = 170000
Step 273: 170000 + 625 = 170625

So, 625*273 = 170625