OK, let's crack this. We're given 600 and our task is to multiply it by 361. Essentially, we'll be adding 600 to itself 361 times.
Step 1: 0 + 600 = 600
Step 2: 600 + 600 = 1200
Step 3: 1200 + 600 = 1800
Step 4: 1800 + 600 = 2400
Step 5: 2400 + 600 = 3000
Step 6: 3000 + 600 = 3600
Step 7: 3600 + 600 = 4200
Step 8: 4200 + 600 = 4800
Step 9: 4800 + 600 = 5400
Step 10: 5400 + 600 = 6000
Step 11: 6000 + 600 = 6600
Step 12: 6600 + 600 = 7200
Step 13: 7200 + 600 = 7800
Step 14: 7800 + 600 = 8400
Step 15: 8400 + 600 = 9000
Step 16: 9000 + 600 = 9600
Step 17: 9600 + 600 = 10200
Step 18: 10200 + 600 = 10800
Step 19: 10800 + 600 = 11400
Step 20: 11400 + 600 = 12000
Step 21: 12000 + 600 = 12600
Step 22: 12600 + 600 = 13200
Step 23: 13200 + 600 = 13800
Step 24: 13800 + 600 = 14400
Step 25: 14400 + 600 = 15000
Step 26: 15000 + 600 = 15600
Step 27: 15600 + 600 = 16200
Step 28: 16200 + 600 = 16800
Step 29: 16800 + 600 = 17400
Step 30: 17400 + 600 = 18000
Step 31: 18000 + 600 = 18600
Step 32: 18600 + 600 = 19200
Step 33: 19200 + 600 = 19800
Step 34: 19800 + 600 = 20400
Step 35: 20400 + 600 = 21000
Step 36: 21000 + 600 = 21600
Step 37: 21600 + 600 = 22200
Step 38: 22200 + 600 = 22800
Step 39: 22800 + 600 = 23400
Step 40: 23400 + 600 = 24000
Step 41: 24000 + 600 = 24600
Step 42: 24600 + 600 = 25200
Step 43: 25200 + 600 = 25800
Step 44: 25800 + 600 = 26400
Step 45: 26400 + 600 = 27000
Step 46: 27000 + 600 = 27600
Step 47: 27600 + 600 = 28200
Step 48: 28200 + 600 = 28800
Step 49: 28800 + 600 = 29400
Step 50: 29400 + 600 = 30000
Step 51: 30000 + 600 = 30600
Step 52: 30600 + 600 = 31200
Step 53: 31200 + 600 = 31800
Step 54: 31800 + 600 = 32400
Step 55: 32400 + 600 = 33000
Step 56: 33000 + 600 = 33600
Step 57: 33600 + 600 = 34200
Step 58: 34200 + 600 = 34800
Step 59: 34800 + 600 = 35400
Step 60: 35400 + 600 = 36000
Step 61: 36000 + 600 = 36600
Step 62: 36600 + 600 = 37200
Step 63: 37200 + 600 = 37800
Step 64: 37800 + 600 = 38400
Step 65: 38400 + 600 = 39000
Step 66: 39000 + 600 = 39600
Step 67: 39600 + 600 = 40200
Step 68: 40200 + 600 = 40800
Step 69: 40800 + 600 = 41400
Step 70: 41400 + 600 = 42000
Step 71: 42000 + 600 = 42600
Step 72: 42600 + 600 = 43200
Step 73: 43200 + 600 = 43800
Step 74: 43800 + 600 = 44400
Step 75: 44400 + 600 = 45000
Step 76: 45000 + 600 = 45600
Step 77: 45600 + 600 = 46200
Step 78: 46200 + 600 = 46800
Step 79: 46800 + 600 = 47400
Step 80: 47400 + 600 = 48000
Step 81: 48000 + 600 = 48600
Step 82: 48600 + 600 = 49200
Step 83: 49200 + 600 = 49800
Step 84: 49800 + 600 = 50400
Step 85: 50400 + 600 = 51000
Step 86: 51000 + 600 = 51600
Step 87: 51600 + 600 = 52200
Step 88: 52200 + 600 = 52800
Step 89: 52800 + 600 = 53400
Step 90: 53400 + 600 = 54000
Step 91: 54000 + 600 = 54600
Step 92: 54600 + 600 = 55200
Step 93: 55200 + 600 = 55800
Step 94: 55800 + 600 = 56400
Step 95: 56400 + 600 = 57000
Step 96: 57000 + 600 = 57600
Step 97: 57600 + 600 = 58200
Step 98: 58200 + 600 = 58800
Step 99: 58800 + 600 = 59400
Step 100: 59400 + 600 = 60000
Step 101: 60000 + 600 = 60600
Step 102: 60600 + 600 = 61200
Step 103: 61200 + 600 = 61800
Step 104: 61800 + 600 = 62400
Step 105: 62400 + 600 = 63000
Step 106: 63000 + 600 = 63600
Step 107: 63600 + 600 = 64200
Step 108: 64200 + 600 = 64800
Step 109: 64800 + 600 = 65400
Step 110: 65400 + 600 = 66000
Step 111: 66000 + 600 = 66600
Step 112: 66600 + 600 = 67200
Step 113: 67200 + 600 = 67800
Step 114: 67800 + 600 = 68400
Step 115: 68400 + 600 = 69000
Step 116: 69000 + 600 = 69600
Step 117: 69600 + 600 = 70200
Step 118: 70200 + 600 = 70800
Step 119: 70800 + 600 = 71400
Step 120: 71400 + 600 = 72000
Step 121: 72000 + 600 = 72600
Step 122: 72600 + 600 = 73200
Step 123: 73200 + 600 = 73800
Step 124: 73800 + 600 = 74400
Step 125: 74400 + 600 = 75000
Step 126: 75000 + 600 = 75600
Step 127: 75600 + 600 = 76200
Step 128: 76200 + 600 = 76800
Step 129: 76800 + 600 = 77400
Step 130: 77400 + 600 = 78000
Step 131: 78000 + 600 = 78600
Step 132: 78600 + 600 = 79200
Step 133: 79200 + 600 = 79800
Step 134: 79800 + 600 = 80400
Step 135: 80400 + 600 = 81000
Step 136: 81000 + 600 = 81600
Step 137: 81600 + 600 = 82200
Step 138: 82200 + 600 = 82800
Step 139: 82800 + 600 = 83400
Step 140: 83400 + 600 = 84000
Step 141: 84000 + 600 = 84600
Step 142: 84600 + 600 = 85200
Step 143: 85200 + 600 = 85800
Step 144: 85800 + 600 = 86400
Step 145: 86400 + 600 = 87000
Step 146: 87000 + 600 = 87600
Step 147: 87600 + 600 = 88200
Step 148: 88200 + 600 = 88800
Step 149: 88800 + 600 = 89400
Step 150: 89400 + 600 = 90000
Step 151: 90000 + 600 = 90600
Step 152: 90600 + 600 = 91200
Step 153: 91200 + 600 = 91800
Step 154: 91800 + 600 = 92400
Step 155: 92400 + 600 = 93000
Step 156: 93000 + 600 = 93600
Step 157: 93600 + 600 = 94200
Step 158: 94200 + 600 = 94800
Step 159: 94800 + 600 = 95400
Step 160: 95400 + 600 = 96000
Step 161: 96000 + 600 = 96600
Step 162: 96600 + 600 = 97200
Step 163: 97200 + 600 = 97800
Step 164: 97800 + 600 = 98400
Step 165: 98400 + 600 = 99000
Step 166: 99000 + 600 = 99600
Step 167: 99600 + 600 = 100200
Step 168: 100200 + 600 = 100800
Step 169: 100800 + 600 = 101400
Step 170: 101400 + 600 = 102000
Step 171: 102000 + 600 = 102600
Step 172: 102600 + 600 = 103200
Step 173: 103200 + 600 = 103800
Step 174: 103800 + 600 = 104400
Step 175: 104400 + 600 = 105000
Step 176: 105000 + 600 = 105600
Step 177: 105600 + 600 = 106200
Step 178: 106200 + 600 = 106800
Step 179: 106800 + 600 = 107400
Step 180: 107400 + 600 = 108000
Step 181: 108000 + 600 = 108600
Step 182: 108600 + 600 = 109200
Step 183: 109200 + 600 = 109800
Step 184: 109800 + 600 = 110400
Step 185: 110400 + 600 = 111000
Step 186: 111000 + 600 = 111600
Step 187: 111600 + 600 = 112200
Step 188: 112200 + 600 = 112800
Step 189: 112800 + 600 = 113400
Step 190: 113400 + 600 = 114000
Step 191: 114000 + 600 = 114600
Step 192: 114600 + 600 = 115200
Step 193: 115200 + 600 = 115800
Step 194: 115800 + 600 = 116400
Step 195: 116400 + 600 = 117000
Step 196: 117000 + 600 = 117600
Step 197: 117600 + 600 = 118200
Step 198: 118200 + 600 = 118800
Step 199: 118800 + 600 = 119400
Step 200: 119400 + 600 = 120000
Step 201: 120000 + 600 = 120600
Step 202: 120600 + 600 = 121200
Step 203: 121200 + 600 = 121800
Step 204: 121800 + 600 = 122400
Step 205: 122400 + 600 = 123000
Step 206: 123000 + 600 = 123600
Step 207: 123600 + 600 = 124200
Step 208: 124200 + 600 = 124800
Step 209: 124800 + 600 = 125400
Step 210: 125400 + 600 = 126000
Step 211: 126000 + 600 = 126600
Step 212: 126600 + 600 = 127200
Step 213: 127200 + 600 = 127800
Step 214: 127800 + 600 = 128400
Step 215: 128400 + 600 = 129000
Step 216: 129000 + 600 = 129600
Step 217: 129600 + 600 = 130200
Step 218: 130200 + 600 = 130800
Step 219: 130800 + 600 = 131400
Step 220: 131400 + 600 = 132000
Step 221: 132000 + 600 = 132600
Step 222: 132600 + 600 = 133200
Step 223: 133200 + 600 = 133800
Step 224: 133800 + 600 = 134400
Step 225: 134400 + 600 = 135000
Step 226: 135000 + 600 = 135600
Step 227: 135600 + 600 = 136200
Step 228: 136200 + 600 = 136800
Step 229: 136800 + 600 = 137400
Step 230: 137400 + 600 = 138000
Step 231: 138000 + 600 = 138600
Step 232: 138600 + 600 = 139200
Step 233: 139200 + 600 = 139800
Step 234: 139800 + 600 = 140400
Step 235: 140400 + 600 = 141000
Step 236: 141000 + 600 = 141600
Step 237: 141600 + 600 = 142200
Step 238: 142200 + 600 = 142800
Step 239: 142800 + 600 = 143400
Step 240: 143400 + 600 = 144000
Step 241: 144000 + 600 = 144600
Step 242: 144600 + 600 = 145200
Step 243: 145200 + 600 = 145800
Step 244: 145800 + 600 = 146400
Step 245: 146400 + 600 = 147000
Step 246: 147000 + 600 = 147600
Step 247: 147600 + 600 = 148200
Step 248: 148200 + 600 = 148800
Step 249: 148800 + 600 = 149400
Step 250: 149400 + 600 = 150000
Step 251: 150000 + 600 = 150600
Step 252: 150600 + 600 = 151200
Step 253: 151200 + 600 = 151800
Step 254: 151800 + 600 = 152400
Step 255: 152400 + 600 = 153000
Step 256: 153000 + 600 = 153600
Step 257: 153600 + 600 = 154200
Step 258: 154200 + 600 = 154800
Step 259: 154800 + 600 = 155400
Step 260: 155400 + 600 = 156000
Step 261: 156000 + 600 = 156600
Step 262: 156600 + 600 = 157200
Step 263: 157200 + 600 = 157800
Step 264: 157800 + 600 = 158400
Step 265: 158400 + 600 = 159000
Step 266: 159000 + 600 = 159600
Step 267: 159600 + 600 = 160200
Step 268: 160200 + 600 = 160800
Step 269: 160800 + 600 = 161400
Step 270: 161400 + 600 = 162000
Step 271: 162000 + 600 = 162600
Step 272: 162600 + 600 = 163200
Step 273: 163200 + 600 = 163800
Step 274: 163800 + 600 = 164400
Step 275: 164400 + 600 = 165000
Step 276: 165000 + 600 = 165600
Step 277: 165600 + 600 = 166200
Step 278: 166200 + 600 = 166800
Step 279: 166800 + 600 = 167400
Step 280: 167400 + 600 = 168000
Step 281: 168000 + 600 = 168600
Step 282: 168600 + 600 = 169200
Step 283: 169200 + 600 = 169800
Step 284: 169800 + 600 = 170400
Step 285: 170400 + 600 = 171000
Step 286: 171000 + 600 = 171600
Step 287: 171600 + 600 = 172200
Step 288: 172200 + 600 = 172800
Step 289: 172800 + 600 = 173400
Step 290: 173400 + 600 = 174000
Step 291: 174000 + 600 = 174600
Step 292: 174600 + 600 = 175200
Step 293: 175200 + 600 = 175800
Step 294: 175800 + 600 = 176400
Step 295: 176400 + 600 = 177000
Step 296: 177000 + 600 = 177600
Step 297: 177600 + 600 = 178200
Step 298: 178200 + 600 = 178800
Step 299: 178800 + 600 = 179400
Step 300: 179400 + 600 = 180000
Step 301: 180000 + 600 = 180600
Step 302: 180600 + 600 = 181200
Step 303: 181200 + 600 = 181800
Step 304: 181800 + 600 = 182400
Step 305: 182400 + 600 = 183000
Step 306: 183000 + 600 = 183600
Step 307: 183600 + 600 = 184200
Step 308: 184200 + 600 = 184800
Step 309: 184800 + 600 = 185400
Step 310: 185400 + 600 = 186000
Step 311: 186000 + 600 = 186600
Step 312: 186600 + 600 = 187200
Step 313: 187200 + 600 = 187800
Step 314: 187800 + 600 = 188400
Step 315: 188400 + 600 = 189000
Step 316: 189000 + 600 = 189600
Step 317: 189600 + 600 = 190200
Step 318: 190200 + 600 = 190800
Step 319: 190800 + 600 = 191400
Step 320: 191400 + 600 = 192000
Step 321: 192000 + 600 = 192600
Step 322: 192600 + 600 = 193200
Step 323: 193200 + 600 = 193800
Step 324: 193800 + 600 = 194400
Step 325: 194400 + 600 = 195000
Step 326: 195000 + 600 = 195600
Step 327: 195600 + 600 = 196200
Step 328: 196200 + 600 = 196800
Step 329: 196800 + 600 = 197400
Step 330: 197400 + 600 = 198000
Step 331: 198000 + 600 = 198600
Step 332: 198600 + 600 = 199200
Step 333: 199200 + 600 = 199800
Step 334: 199800 + 600 = 200400
Step 335: 200400 + 600 = 201000
Step 336: 201000 + 600 = 201600
Step 337: 201600 + 600 = 202200
Step 338: 202200 + 600 = 202800
Step 339: 202800 + 600 = 203400
Step 340: 203400 + 600 = 204000
Step 341: 204000 + 600 = 204600
Step 342: 204600 + 600 = 205200
Step 343: 205200 + 600 = 205800
Step 344: 205800 + 600 = 206400
Step 345: 206400 + 600 = 207000
Step 346: 207000 + 600 = 207600
Step 347: 207600 + 600 = 208200
Step 348: 208200 + 600 = 208800
Step 349: 208800 + 600 = 209400
Step 350: 209400 + 600 = 210000
Step 351: 210000 + 600 = 210600
Step 352: 210600 + 600 = 211200
Step 353: 211200 + 600 = 211800
Step 354: 211800 + 600 = 212400
Step 355: 212400 + 600 = 213000
Step 356: 213000 + 600 = 213600
Step 357: 213600 + 600 = 214200
Step 358: 214200 + 600 = 214800
Step 359: 214800 + 600 = 215400
Step 360: 215400 + 600 = 216000
Step 361: 216000 + 600 = 216600

So, 600*361 = 216600