Alright, let's solve this math problem step by step. First, we have the number 424. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 210. So, we're going to take the number 424 and add it to itself 210 times.
Step 1: 0 + 424 = 424
Step 2: 424 + 424 = 848
Step 3: 848 + 424 = 1272
Step 4: 1272 + 424 = 1696
Step 5: 1696 + 424 = 2120
Step 6: 2120 + 424 = 2544
Step 7: 2544 + 424 = 2968
Step 8: 2968 + 424 = 3392
Step 9: 3392 + 424 = 3816
Step 10: 3816 + 424 = 4240
Step 11: 4240 + 424 = 4664
Step 12: 4664 + 424 = 5088
Step 13: 5088 + 424 = 5512
Step 14: 5512 + 424 = 5936
Step 15: 5936 + 424 = 6360
Step 16: 6360 + 424 = 6784
Step 17: 6784 + 424 = 7208
Step 18: 7208 + 424 = 7632
Step 19: 7632 + 424 = 8056
Step 20: 8056 + 424 = 8480
Step 21: 8480 + 424 = 8904
Step 22: 8904 + 424 = 9328
Step 23: 9328 + 424 = 9752
Step 24: 9752 + 424 = 10176
Step 25: 10176 + 424 = 10600
Step 26: 10600 + 424 = 11024
Step 27: 11024 + 424 = 11448
Step 28: 11448 + 424 = 11872
Step 29: 11872 + 424 = 12296
Step 30: 12296 + 424 = 12720
Step 31: 12720 + 424 = 13144
Step 32: 13144 + 424 = 13568
Step 33: 13568 + 424 = 13992
Step 34: 13992 + 424 = 14416
Step 35: 14416 + 424 = 14840
Step 36: 14840 + 424 = 15264
Step 37: 15264 + 424 = 15688
Step 38: 15688 + 424 = 16112
Step 39: 16112 + 424 = 16536
Step 40: 16536 + 424 = 16960
Step 41: 16960 + 424 = 17384
Step 42: 17384 + 424 = 17808
Step 43: 17808 + 424 = 18232
Step 44: 18232 + 424 = 18656
Step 45: 18656 + 424 = 19080
Step 46: 19080 + 424 = 19504
Step 47: 19504 + 424 = 19928
Step 48: 19928 + 424 = 20352
Step 49: 20352 + 424 = 20776
Step 50: 20776 + 424 = 21200
Step 51: 21200 + 424 = 21624
Step 52: 21624 + 424 = 22048
Step 53: 22048 + 424 = 22472
Step 54: 22472 + 424 = 22896
Step 55: 22896 + 424 = 23320
Step 56: 23320 + 424 = 23744
Step 57: 23744 + 424 = 24168
Step 58: 24168 + 424 = 24592
Step 59: 24592 + 424 = 25016
Step 60: 25016 + 424 = 25440
Step 61: 25440 + 424 = 25864
Step 62: 25864 + 424 = 26288
Step 63: 26288 + 424 = 26712
Step 64: 26712 + 424 = 27136
Step 65: 27136 + 424 = 27560
Step 66: 27560 + 424 = 27984
Step 67: 27984 + 424 = 28408
Step 68: 28408 + 424 = 28832
Step 69: 28832 + 424 = 29256
Step 70: 29256 + 424 = 29680
Step 71: 29680 + 424 = 30104
Step 72: 30104 + 424 = 30528
Step 73: 30528 + 424 = 30952
Step 74: 30952 + 424 = 31376
Step 75: 31376 + 424 = 31800
Step 76: 31800 + 424 = 32224
Step 77: 32224 + 424 = 32648
Step 78: 32648 + 424 = 33072
Step 79: 33072 + 424 = 33496
Step 80: 33496 + 424 = 33920
Step 81: 33920 + 424 = 34344
Step 82: 34344 + 424 = 34768
Step 83: 34768 + 424 = 35192
Step 84: 35192 + 424 = 35616
Step 85: 35616 + 424 = 36040
Step 86: 36040 + 424 = 36464
Step 87: 36464 + 424 = 36888
Step 88: 36888 + 424 = 37312
Step 89: 37312 + 424 = 37736
Step 90: 37736 + 424 = 38160
Step 91: 38160 + 424 = 38584
Step 92: 38584 + 424 = 39008
Step 93: 39008 + 424 = 39432
Step 94: 39432 + 424 = 39856
Step 95: 39856 + 424 = 40280
Step 96: 40280 + 424 = 40704
Step 97: 40704 + 424 = 41128
Step 98: 41128 + 424 = 41552
Step 99: 41552 + 424 = 41976
Step 100: 41976 + 424 = 42400
Step 101: 42400 + 424 = 42824
Step 102: 42824 + 424 = 43248
Step 103: 43248 + 424 = 43672
Step 104: 43672 + 424 = 44096
Step 105: 44096 + 424 = 44520
Step 106: 44520 + 424 = 44944
Step 107: 44944 + 424 = 45368
Step 108: 45368 + 424 = 45792
Step 109: 45792 + 424 = 46216
Step 110: 46216 + 424 = 46640
Step 111: 46640 + 424 = 47064
Step 112: 47064 + 424 = 47488
Step 113: 47488 + 424 = 47912
Step 114: 47912 + 424 = 48336
Step 115: 48336 + 424 = 48760
Step 116: 48760 + 424 = 49184
Step 117: 49184 + 424 = 49608
Step 118: 49608 + 424 = 50032
Step 119: 50032 + 424 = 50456
Step 120: 50456 + 424 = 50880
Step 121: 50880 + 424 = 51304
Step 122: 51304 + 424 = 51728
Step 123: 51728 + 424 = 52152
Step 124: 52152 + 424 = 52576
Step 125: 52576 + 424 = 53000
Step 126: 53000 + 424 = 53424
Step 127: 53424 + 424 = 53848
Step 128: 53848 + 424 = 54272
Step 129: 54272 + 424 = 54696
Step 130: 54696 + 424 = 55120
Step 131: 55120 + 424 = 55544
Step 132: 55544 + 424 = 55968
Step 133: 55968 + 424 = 56392
Step 134: 56392 + 424 = 56816
Step 135: 56816 + 424 = 57240
Step 136: 57240 + 424 = 57664
Step 137: 57664 + 424 = 58088
Step 138: 58088 + 424 = 58512
Step 139: 58512 + 424 = 58936
Step 140: 58936 + 424 = 59360
Step 141: 59360 + 424 = 59784
Step 142: 59784 + 424 = 60208
Step 143: 60208 + 424 = 60632
Step 144: 60632 + 424 = 61056
Step 145: 61056 + 424 = 61480
Step 146: 61480 + 424 = 61904
Step 147: 61904 + 424 = 62328
Step 148: 62328 + 424 = 62752
Step 149: 62752 + 424 = 63176
Step 150: 63176 + 424 = 63600
Step 151: 63600 + 424 = 64024
Step 152: 64024 + 424 = 64448
Step 153: 64448 + 424 = 64872
Step 154: 64872 + 424 = 65296
Step 155: 65296 + 424 = 65720
Step 156: 65720 + 424 = 66144
Step 157: 66144 + 424 = 66568
Step 158: 66568 + 424 = 66992
Step 159: 66992 + 424 = 67416
Step 160: 67416 + 424 = 67840
Step 161: 67840 + 424 = 68264
Step 162: 68264 + 424 = 68688
Step 163: 68688 + 424 = 69112
Step 164: 69112 + 424 = 69536
Step 165: 69536 + 424 = 69960
Step 166: 69960 + 424 = 70384
Step 167: 70384 + 424 = 70808
Step 168: 70808 + 424 = 71232
Step 169: 71232 + 424 = 71656
Step 170: 71656 + 424 = 72080
Step 171: 72080 + 424 = 72504
Step 172: 72504 + 424 = 72928
Step 173: 72928 + 424 = 73352
Step 174: 73352 + 424 = 73776
Step 175: 73776 + 424 = 74200
Step 176: 74200 + 424 = 74624
Step 177: 74624 + 424 = 75048
Step 178: 75048 + 424 = 75472
Step 179: 75472 + 424 = 75896
Step 180: 75896 + 424 = 76320
Step 181: 76320 + 424 = 76744
Step 182: 76744 + 424 = 77168
Step 183: 77168 + 424 = 77592
Step 184: 77592 + 424 = 78016
Step 185: 78016 + 424 = 78440
Step 186: 78440 + 424 = 78864
Step 187: 78864 + 424 = 79288
Step 188: 79288 + 424 = 79712
Step 189: 79712 + 424 = 80136
Step 190: 80136 + 424 = 80560
Step 191: 80560 + 424 = 80984
Step 192: 80984 + 424 = 81408
Step 193: 81408 + 424 = 81832
Step 194: 81832 + 424 = 82256
Step 195: 82256 + 424 = 82680
Step 196: 82680 + 424 = 83104
Step 197: 83104 + 424 = 83528
Step 198: 83528 + 424 = 83952
Step 199: 83952 + 424 = 84376
Step 200: 84376 + 424 = 84800
Step 201: 84800 + 424 = 85224
Step 202: 85224 + 424 = 85648
Step 203: 85648 + 424 = 86072
Step 204: 86072 + 424 = 86496
Step 205: 86496 + 424 = 86920
Step 206: 86920 + 424 = 87344
Step 207: 87344 + 424 = 87768
Step 208: 87768 + 424 = 88192
Step 209: 88192 + 424 = 88616
Step 210: 88616 + 424 = 89040

So, 424*210 = 89040