Alright, let's solve this math problem step by step. First, we have the number 324. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 390. So, we're going to take the number 324 and add it to itself 390 times.
Step 1: 0 + 324 = 324
Step 2: 324 + 324 = 648
Step 3: 648 + 324 = 972
Step 4: 972 + 324 = 1296
Step 5: 1296 + 324 = 1620
Step 6: 1620 + 324 = 1944
Step 7: 1944 + 324 = 2268
Step 8: 2268 + 324 = 2592
Step 9: 2592 + 324 = 2916
Step 10: 2916 + 324 = 3240
Step 11: 3240 + 324 = 3564
Step 12: 3564 + 324 = 3888
Step 13: 3888 + 324 = 4212
Step 14: 4212 + 324 = 4536
Step 15: 4536 + 324 = 4860
Step 16: 4860 + 324 = 5184
Step 17: 5184 + 324 = 5508
Step 18: 5508 + 324 = 5832
Step 19: 5832 + 324 = 6156
Step 20: 6156 + 324 = 6480
Step 21: 6480 + 324 = 6804
Step 22: 6804 + 324 = 7128
Step 23: 7128 + 324 = 7452
Step 24: 7452 + 324 = 7776
Step 25: 7776 + 324 = 8100
Step 26: 8100 + 324 = 8424
Step 27: 8424 + 324 = 8748
Step 28: 8748 + 324 = 9072
Step 29: 9072 + 324 = 9396
Step 30: 9396 + 324 = 9720
Step 31: 9720 + 324 = 10044
Step 32: 10044 + 324 = 10368
Step 33: 10368 + 324 = 10692
Step 34: 10692 + 324 = 11016
Step 35: 11016 + 324 = 11340
Step 36: 11340 + 324 = 11664
Step 37: 11664 + 324 = 11988
Step 38: 11988 + 324 = 12312
Step 39: 12312 + 324 = 12636
Step 40: 12636 + 324 = 12960
Step 41: 12960 + 324 = 13284
Step 42: 13284 + 324 = 13608
Step 43: 13608 + 324 = 13932
Step 44: 13932 + 324 = 14256
Step 45: 14256 + 324 = 14580
Step 46: 14580 + 324 = 14904
Step 47: 14904 + 324 = 15228
Step 48: 15228 + 324 = 15552
Step 49: 15552 + 324 = 15876
Step 50: 15876 + 324 = 16200
Step 51: 16200 + 324 = 16524
Step 52: 16524 + 324 = 16848
Step 53: 16848 + 324 = 17172
Step 54: 17172 + 324 = 17496
Step 55: 17496 + 324 = 17820
Step 56: 17820 + 324 = 18144
Step 57: 18144 + 324 = 18468
Step 58: 18468 + 324 = 18792
Step 59: 18792 + 324 = 19116
Step 60: 19116 + 324 = 19440
Step 61: 19440 + 324 = 19764
Step 62: 19764 + 324 = 20088
Step 63: 20088 + 324 = 20412
Step 64: 20412 + 324 = 20736
Step 65: 20736 + 324 = 21060
Step 66: 21060 + 324 = 21384
Step 67: 21384 + 324 = 21708
Step 68: 21708 + 324 = 22032
Step 69: 22032 + 324 = 22356
Step 70: 22356 + 324 = 22680
Step 71: 22680 + 324 = 23004
Step 72: 23004 + 324 = 23328
Step 73: 23328 + 324 = 23652
Step 74: 23652 + 324 = 23976
Step 75: 23976 + 324 = 24300
Step 76: 24300 + 324 = 24624
Step 77: 24624 + 324 = 24948
Step 78: 24948 + 324 = 25272
Step 79: 25272 + 324 = 25596
Step 80: 25596 + 324 = 25920
Step 81: 25920 + 324 = 26244
Step 82: 26244 + 324 = 26568
Step 83: 26568 + 324 = 26892
Step 84: 26892 + 324 = 27216
Step 85: 27216 + 324 = 27540
Step 86: 27540 + 324 = 27864
Step 87: 27864 + 324 = 28188
Step 88: 28188 + 324 = 28512
Step 89: 28512 + 324 = 28836
Step 90: 28836 + 324 = 29160
Step 91: 29160 + 324 = 29484
Step 92: 29484 + 324 = 29808
Step 93: 29808 + 324 = 30132
Step 94: 30132 + 324 = 30456
Step 95: 30456 + 324 = 30780
Step 96: 30780 + 324 = 31104
Step 97: 31104 + 324 = 31428
Step 98: 31428 + 324 = 31752
Step 99: 31752 + 324 = 32076
Step 100: 32076 + 324 = 32400
Step 101: 32400 + 324 = 32724
Step 102: 32724 + 324 = 33048
Step 103: 33048 + 324 = 33372
Step 104: 33372 + 324 = 33696
Step 105: 33696 + 324 = 34020
Step 106: 34020 + 324 = 34344
Step 107: 34344 + 324 = 34668
Step 108: 34668 + 324 = 34992
Step 109: 34992 + 324 = 35316
Step 110: 35316 + 324 = 35640
Step 111: 35640 + 324 = 35964
Step 112: 35964 + 324 = 36288
Step 113: 36288 + 324 = 36612
Step 114: 36612 + 324 = 36936
Step 115: 36936 + 324 = 37260
Step 116: 37260 + 324 = 37584
Step 117: 37584 + 324 = 37908
Step 118: 37908 + 324 = 38232
Step 119: 38232 + 324 = 38556
Step 120: 38556 + 324 = 38880
Step 121: 38880 + 324 = 39204
Step 122: 39204 + 324 = 39528
Step 123: 39528 + 324 = 39852
Step 124: 39852 + 324 = 40176
Step 125: 40176 + 324 = 40500
Step 126: 40500 + 324 = 40824
Step 127: 40824 + 324 = 41148
Step 128: 41148 + 324 = 41472
Step 129: 41472 + 324 = 41796
Step 130: 41796 + 324 = 42120
Step 131: 42120 + 324 = 42444
Step 132: 42444 + 324 = 42768
Step 133: 42768 + 324 = 43092
Step 134: 43092 + 324 = 43416
Step 135: 43416 + 324 = 43740
Step 136: 43740 + 324 = 44064
Step 137: 44064 + 324 = 44388
Step 138: 44388 + 324 = 44712
Step 139: 44712 + 324 = 45036
Step 140: 45036 + 324 = 45360
Step 141: 45360 + 324 = 45684
Step 142: 45684 + 324 = 46008
Step 143: 46008 + 324 = 46332
Step 144: 46332 + 324 = 46656
Step 145: 46656 + 324 = 46980
Step 146: 46980 + 324 = 47304
Step 147: 47304 + 324 = 47628
Step 148: 47628 + 324 = 47952
Step 149: 47952 + 324 = 48276
Step 150: 48276 + 324 = 48600
Step 151: 48600 + 324 = 48924
Step 152: 48924 + 324 = 49248
Step 153: 49248 + 324 = 49572
Step 154: 49572 + 324 = 49896
Step 155: 49896 + 324 = 50220
Step 156: 50220 + 324 = 50544
Step 157: 50544 + 324 = 50868
Step 158: 50868 + 324 = 51192
Step 159: 51192 + 324 = 51516
Step 160: 51516 + 324 = 51840
Step 161: 51840 + 324 = 52164
Step 162: 52164 + 324 = 52488
Step 163: 52488 + 324 = 52812
Step 164: 52812 + 324 = 53136
Step 165: 53136 + 324 = 53460
Step 166: 53460 + 324 = 53784
Step 167: 53784 + 324 = 54108
Step 168: 54108 + 324 = 54432
Step 169: 54432 + 324 = 54756
Step 170: 54756 + 324 = 55080
Step 171: 55080 + 324 = 55404
Step 172: 55404 + 324 = 55728
Step 173: 55728 + 324 = 56052
Step 174: 56052 + 324 = 56376
Step 175: 56376 + 324 = 56700
Step 176: 56700 + 324 = 57024
Step 177: 57024 + 324 = 57348
Step 178: 57348 + 324 = 57672
Step 179: 57672 + 324 = 57996
Step 180: 57996 + 324 = 58320
Step 181: 58320 + 324 = 58644
Step 182: 58644 + 324 = 58968
Step 183: 58968 + 324 = 59292
Step 184: 59292 + 324 = 59616
Step 185: 59616 + 324 = 59940
Step 186: 59940 + 324 = 60264
Step 187: 60264 + 324 = 60588
Step 188: 60588 + 324 = 60912
Step 189: 60912 + 324 = 61236
Step 190: 61236 + 324 = 61560
Step 191: 61560 + 324 = 61884
Step 192: 61884 + 324 = 62208
Step 193: 62208 + 324 = 62532
Step 194: 62532 + 324 = 62856
Step 195: 62856 + 324 = 63180
Step 196: 63180 + 324 = 63504
Step 197: 63504 + 324 = 63828
Step 198: 63828 + 324 = 64152
Step 199: 64152 + 324 = 64476
Step 200: 64476 + 324 = 64800
Step 201: 64800 + 324 = 65124
Step 202: 65124 + 324 = 65448
Step 203: 65448 + 324 = 65772
Step 204: 65772 + 324 = 66096
Step 205: 66096 + 324 = 66420
Step 206: 66420 + 324 = 66744
Step 207: 66744 + 324 = 67068
Step 208: 67068 + 324 = 67392
Step 209: 67392 + 324 = 67716
Step 210: 67716 + 324 = 68040
Step 211: 68040 + 324 = 68364
Step 212: 68364 + 324 = 68688
Step 213: 68688 + 324 = 69012
Step 214: 69012 + 324 = 69336
Step 215: 69336 + 324 = 69660
Step 216: 69660 + 324 = 69984
Step 217: 69984 + 324 = 70308
Step 218: 70308 + 324 = 70632
Step 219: 70632 + 324 = 70956
Step 220: 70956 + 324 = 71280
Step 221: 71280 + 324 = 71604
Step 222: 71604 + 324 = 71928
Step 223: 71928 + 324 = 72252
Step 224: 72252 + 324 = 72576
Step 225: 72576 + 324 = 72900
Step 226: 72900 + 324 = 73224
Step 227: 73224 + 324 = 73548
Step 228: 73548 + 324 = 73872
Step 229: 73872 + 324 = 74196
Step 230: 74196 + 324 = 74520
Step 231: 74520 + 324 = 74844
Step 232: 74844 + 324 = 75168
Step 233: 75168 + 324 = 75492
Step 234: 75492 + 324 = 75816
Step 235: 75816 + 324 = 76140
Step 236: 76140 + 324 = 76464
Step 237: 76464 + 324 = 76788
Step 238: 76788 + 324 = 77112
Step 239: 77112 + 324 = 77436
Step 240: 77436 + 324 = 77760
Step 241: 77760 + 324 = 78084
Step 242: 78084 + 324 = 78408
Step 243: 78408 + 324 = 78732
Step 244: 78732 + 324 = 79056
Step 245: 79056 + 324 = 79380
Step 246: 79380 + 324 = 79704
Step 247: 79704 + 324 = 80028
Step 248: 80028 + 324 = 80352
Step 249: 80352 + 324 = 80676
Step 250: 80676 + 324 = 81000
Step 251: 81000 + 324 = 81324
Step 252: 81324 + 324 = 81648
Step 253: 81648 + 324 = 81972
Step 254: 81972 + 324 = 82296
Step 255: 82296 + 324 = 82620
Step 256: 82620 + 324 = 82944
Step 257: 82944 + 324 = 83268
Step 258: 83268 + 324 = 83592
Step 259: 83592 + 324 = 83916
Step 260: 83916 + 324 = 84240
Step 261: 84240 + 324 = 84564
Step 262: 84564 + 324 = 84888
Step 263: 84888 + 324 = 85212
Step 264: 85212 + 324 = 85536
Step 265: 85536 + 324 = 85860
Step 266: 85860 + 324 = 86184
Step 267: 86184 + 324 = 86508
Step 268: 86508 + 324 = 86832
Step 269: 86832 + 324 = 87156
Step 270: 87156 + 324 = 87480
Step 271: 87480 + 324 = 87804
Step 272: 87804 + 324 = 88128
Step 273: 88128 + 324 = 88452
Step 274: 88452 + 324 = 88776
Step 275: 88776 + 324 = 89100
Step 276: 89100 + 324 = 89424
Step 277: 89424 + 324 = 89748
Step 278: 89748 + 324 = 90072
Step 279: 90072 + 324 = 90396
Step 280: 90396 + 324 = 90720
Step 281: 90720 + 324 = 91044
Step 282: 91044 + 324 = 91368
Step 283: 91368 + 324 = 91692
Step 284: 91692 + 324 = 92016
Step 285: 92016 + 324 = 92340
Step 286: 92340 + 324 = 92664
Step 287: 92664 + 324 = 92988
Step 288: 92988 + 324 = 93312
Step 289: 93312 + 324 = 93636
Step 290: 93636 + 324 = 93960
Step 291: 93960 + 324 = 94284
Step 292: 94284 + 324 = 94608
Step 293: 94608 + 324 = 94932
Step 294: 94932 + 324 = 95256
Step 295: 95256 + 324 = 95580
Step 296: 95580 + 324 = 95904
Step 297: 95904 + 324 = 96228
Step 298: 96228 + 324 = 96552
Step 299: 96552 + 324 = 96876
Step 300: 96876 + 324 = 97200
Step 301: 97200 + 324 = 97524
Step 302: 97524 + 324 = 97848
Step 303: 97848 + 324 = 98172
Step 304: 98172 + 324 = 98496
Step 305: 98496 + 324 = 98820
Step 306: 98820 + 324 = 99144
Step 307: 99144 + 324 = 99468
Step 308: 99468 + 324 = 99792
Step 309: 99792 + 324 = 100116
Step 310: 100116 + 324 = 100440
Step 311: 100440 + 324 = 100764
Step 312: 100764 + 324 = 101088
Step 313: 101088 + 324 = 101412
Step 314: 101412 + 324 = 101736
Step 315: 101736 + 324 = 102060
Step 316: 102060 + 324 = 102384
Step 317: 102384 + 324 = 102708
Step 318: 102708 + 324 = 103032
Step 319: 103032 + 324 = 103356
Step 320: 103356 + 324 = 103680
Step 321: 103680 + 324 = 104004
Step 322: 104004 + 324 = 104328
Step 323: 104328 + 324 = 104652
Step 324: 104652 + 324 = 104976
Step 325: 104976 + 324 = 105300
Step 326: 105300 + 324 = 105624
Step 327: 105624 + 324 = 105948
Step 328: 105948 + 324 = 106272
Step 329: 106272 + 324 = 106596
Step 330: 106596 + 324 = 106920
Step 331: 106920 + 324 = 107244
Step 332: 107244 + 324 = 107568
Step 333: 107568 + 324 = 107892
Step 334: 107892 + 324 = 108216
Step 335: 108216 + 324 = 108540
Step 336: 108540 + 324 = 108864
Step 337: 108864 + 324 = 109188
Step 338: 109188 + 324 = 109512
Step 339: 109512 + 324 = 109836
Step 340: 109836 + 324 = 110160
Step 341: 110160 + 324 = 110484
Step 342: 110484 + 324 = 110808
Step 343: 110808 + 324 = 111132
Step 344: 111132 + 324 = 111456
Step 345: 111456 + 324 = 111780
Step 346: 111780 + 324 = 112104
Step 347: 112104 + 324 = 112428
Step 348: 112428 + 324 = 112752
Step 349: 112752 + 324 = 113076
Step 350: 113076 + 324 = 113400
Step 351: 113400 + 324 = 113724
Step 352: 113724 + 324 = 114048
Step 353: 114048 + 324 = 114372
Step 354: 114372 + 324 = 114696
Step 355: 114696 + 324 = 115020
Step 356: 115020 + 324 = 115344
Step 357: 115344 + 324 = 115668
Step 358: 115668 + 324 = 115992
Step 359: 115992 + 324 = 116316
Step 360: 116316 + 324 = 116640
Step 361: 116640 + 324 = 116964
Step 362: 116964 + 324 = 117288
Step 363: 117288 + 324 = 117612
Step 364: 117612 + 324 = 117936
Step 365: 117936 + 324 = 118260
Step 366: 118260 + 324 = 118584
Step 367: 118584 + 324 = 118908
Step 368: 118908 + 324 = 119232
Step 369: 119232 + 324 = 119556
Step 370: 119556 + 324 = 119880
Step 371: 119880 + 324 = 120204
Step 372: 120204 + 324 = 120528
Step 373: 120528 + 324 = 120852
Step 374: 120852 + 324 = 121176
Step 375: 121176 + 324 = 121500
Step 376: 121500 + 324 = 121824
Step 377: 121824 + 324 = 122148
Step 378: 122148 + 324 = 122472
Step 379: 122472 + 324 = 122796
Step 380: 122796 + 324 = 123120
Step 381: 123120 + 324 = 123444
Step 382: 123444 + 324 = 123768
Step 383: 123768 + 324 = 124092
Step 384: 124092 + 324 = 124416
Step 385: 124416 + 324 = 124740
Step 386: 124740 + 324 = 125064
Step 387: 125064 + 324 = 125388
Step 388: 125388 + 324 = 125712
Step 389: 125712 + 324 = 126036
Step 390: 126036 + 324 = 126360

So, 324*390 = 126360