OK, let's work through this together. We're starting with 690 and we're going to multiply it by 217, which means we add 690 to itself 217 times.
Step 1: 0 + 690 = 690
Step 2: 690 + 690 = 1380
Step 3: 1380 + 690 = 2070
Step 4: 2070 + 690 = 2760
Step 5: 2760 + 690 = 3450
Step 6: 3450 + 690 = 4140
Step 7: 4140 + 690 = 4830
Step 8: 4830 + 690 = 5520
Step 9: 5520 + 690 = 6210
Step 10: 6210 + 690 = 6900
Step 11: 6900 + 690 = 7590
Step 12: 7590 + 690 = 8280
Step 13: 8280 + 690 = 8970
Step 14: 8970 + 690 = 9660
Step 15: 9660 + 690 = 10350
Step 16: 10350 + 690 = 11040
Step 17: 11040 + 690 = 11730
Step 18: 11730 + 690 = 12420
Step 19: 12420 + 690 = 13110
Step 20: 13110 + 690 = 13800
Step 21: 13800 + 690 = 14490
Step 22: 14490 + 690 = 15180
Step 23: 15180 + 690 = 15870
Step 24: 15870 + 690 = 16560
Step 25: 16560 + 690 = 17250
Step 26: 17250 + 690 = 17940
Step 27: 17940 + 690 = 18630
Step 28: 18630 + 690 = 19320
Step 29: 19320 + 690 = 20010
Step 30: 20010 + 690 = 20700
Step 31: 20700 + 690 = 21390
Step 32: 21390 + 690 = 22080
Step 33: 22080 + 690 = 22770
Step 34: 22770 + 690 = 23460
Step 35: 23460 + 690 = 24150
Step 36: 24150 + 690 = 24840
Step 37: 24840 + 690 = 25530
Step 38: 25530 + 690 = 26220
Step 39: 26220 + 690 = 26910
Step 40: 26910 + 690 = 27600
Step 41: 27600 + 690 = 28290
Step 42: 28290 + 690 = 28980
Step 43: 28980 + 690 = 29670
Step 44: 29670 + 690 = 30360
Step 45: 30360 + 690 = 31050
Step 46: 31050 + 690 = 31740
Step 47: 31740 + 690 = 32430
Step 48: 32430 + 690 = 33120
Step 49: 33120 + 690 = 33810
Step 50: 33810 + 690 = 34500
Step 51: 34500 + 690 = 35190
Step 52: 35190 + 690 = 35880
Step 53: 35880 + 690 = 36570
Step 54: 36570 + 690 = 37260
Step 55: 37260 + 690 = 37950
Step 56: 37950 + 690 = 38640
Step 57: 38640 + 690 = 39330
Step 58: 39330 + 690 = 40020
Step 59: 40020 + 690 = 40710
Step 60: 40710 + 690 = 41400
Step 61: 41400 + 690 = 42090
Step 62: 42090 + 690 = 42780
Step 63: 42780 + 690 = 43470
Step 64: 43470 + 690 = 44160
Step 65: 44160 + 690 = 44850
Step 66: 44850 + 690 = 45540
Step 67: 45540 + 690 = 46230
Step 68: 46230 + 690 = 46920
Step 69: 46920 + 690 = 47610
Step 70: 47610 + 690 = 48300
Step 71: 48300 + 690 = 48990
Step 72: 48990 + 690 = 49680
Step 73: 49680 + 690 = 50370
Step 74: 50370 + 690 = 51060
Step 75: 51060 + 690 = 51750
Step 76: 51750 + 690 = 52440
Step 77: 52440 + 690 = 53130
Step 78: 53130 + 690 = 53820
Step 79: 53820 + 690 = 54510
Step 80: 54510 + 690 = 55200
Step 81: 55200 + 690 = 55890
Step 82: 55890 + 690 = 56580
Step 83: 56580 + 690 = 57270
Step 84: 57270 + 690 = 57960
Step 85: 57960 + 690 = 58650
Step 86: 58650 + 690 = 59340
Step 87: 59340 + 690 = 60030
Step 88: 60030 + 690 = 60720
Step 89: 60720 + 690 = 61410
Step 90: 61410 + 690 = 62100
Step 91: 62100 + 690 = 62790
Step 92: 62790 + 690 = 63480
Step 93: 63480 + 690 = 64170
Step 94: 64170 + 690 = 64860
Step 95: 64860 + 690 = 65550
Step 96: 65550 + 690 = 66240
Step 97: 66240 + 690 = 66930
Step 98: 66930 + 690 = 67620
Step 99: 67620 + 690 = 68310
Step 100: 68310 + 690 = 69000
Step 101: 69000 + 690 = 69690
Step 102: 69690 + 690 = 70380
Step 103: 70380 + 690 = 71070
Step 104: 71070 + 690 = 71760
Step 105: 71760 + 690 = 72450
Step 106: 72450 + 690 = 73140
Step 107: 73140 + 690 = 73830
Step 108: 73830 + 690 = 74520
Step 109: 74520 + 690 = 75210
Step 110: 75210 + 690 = 75900
Step 111: 75900 + 690 = 76590
Step 112: 76590 + 690 = 77280
Step 113: 77280 + 690 = 77970
Step 114: 77970 + 690 = 78660
Step 115: 78660 + 690 = 79350
Step 116: 79350 + 690 = 80040
Step 117: 80040 + 690 = 80730
Step 118: 80730 + 690 = 81420
Step 119: 81420 + 690 = 82110
Step 120: 82110 + 690 = 82800
Step 121: 82800 + 690 = 83490
Step 122: 83490 + 690 = 84180
Step 123: 84180 + 690 = 84870
Step 124: 84870 + 690 = 85560
Step 125: 85560 + 690 = 86250
Step 126: 86250 + 690 = 86940
Step 127: 86940 + 690 = 87630
Step 128: 87630 + 690 = 88320
Step 129: 88320 + 690 = 89010
Step 130: 89010 + 690 = 89700
Step 131: 89700 + 690 = 90390
Step 132: 90390 + 690 = 91080
Step 133: 91080 + 690 = 91770
Step 134: 91770 + 690 = 92460
Step 135: 92460 + 690 = 93150
Step 136: 93150 + 690 = 93840
Step 137: 93840 + 690 = 94530
Step 138: 94530 + 690 = 95220
Step 139: 95220 + 690 = 95910
Step 140: 95910 + 690 = 96600
Step 141: 96600 + 690 = 97290
Step 142: 97290 + 690 = 97980
Step 143: 97980 + 690 = 98670
Step 144: 98670 + 690 = 99360
Step 145: 99360 + 690 = 100050
Step 146: 100050 + 690 = 100740
Step 147: 100740 + 690 = 101430
Step 148: 101430 + 690 = 102120
Step 149: 102120 + 690 = 102810
Step 150: 102810 + 690 = 103500
Step 151: 103500 + 690 = 104190
Step 152: 104190 + 690 = 104880
Step 153: 104880 + 690 = 105570
Step 154: 105570 + 690 = 106260
Step 155: 106260 + 690 = 106950
Step 156: 106950 + 690 = 107640
Step 157: 107640 + 690 = 108330
Step 158: 108330 + 690 = 109020
Step 159: 109020 + 690 = 109710
Step 160: 109710 + 690 = 110400
Step 161: 110400 + 690 = 111090
Step 162: 111090 + 690 = 111780
Step 163: 111780 + 690 = 112470
Step 164: 112470 + 690 = 113160
Step 165: 113160 + 690 = 113850
Step 166: 113850 + 690 = 114540
Step 167: 114540 + 690 = 115230
Step 168: 115230 + 690 = 115920
Step 169: 115920 + 690 = 116610
Step 170: 116610 + 690 = 117300
Step 171: 117300 + 690 = 117990
Step 172: 117990 + 690 = 118680
Step 173: 118680 + 690 = 119370
Step 174: 119370 + 690 = 120060
Step 175: 120060 + 690 = 120750
Step 176: 120750 + 690 = 121440
Step 177: 121440 + 690 = 122130
Step 178: 122130 + 690 = 122820
Step 179: 122820 + 690 = 123510
Step 180: 123510 + 690 = 124200
Step 181: 124200 + 690 = 124890
Step 182: 124890 + 690 = 125580
Step 183: 125580 + 690 = 126270
Step 184: 126270 + 690 = 126960
Step 185: 126960 + 690 = 127650
Step 186: 127650 + 690 = 128340
Step 187: 128340 + 690 = 129030
Step 188: 129030 + 690 = 129720
Step 189: 129720 + 690 = 130410
Step 190: 130410 + 690 = 131100
Step 191: 131100 + 690 = 131790
Step 192: 131790 + 690 = 132480
Step 193: 132480 + 690 = 133170
Step 194: 133170 + 690 = 133860
Step 195: 133860 + 690 = 134550
Step 196: 134550 + 690 = 135240
Step 197: 135240 + 690 = 135930
Step 198: 135930 + 690 = 136620
Step 199: 136620 + 690 = 137310
Step 200: 137310 + 690 = 138000
Step 201: 138000 + 690 = 138690
Step 202: 138690 + 690 = 139380
Step 203: 139380 + 690 = 140070
Step 204: 140070 + 690 = 140760
Step 205: 140760 + 690 = 141450
Step 206: 141450 + 690 = 142140
Step 207: 142140 + 690 = 142830
Step 208: 142830 + 690 = 143520
Step 209: 143520 + 690 = 144210
Step 210: 144210 + 690 = 144900
Step 211: 144900 + 690 = 145590
Step 212: 145590 + 690 = 146280
Step 213: 146280 + 690 = 146970
Step 214: 146970 + 690 = 147660
Step 215: 147660 + 690 = 148350
Step 216: 148350 + 690 = 149040
Step 217: 149040 + 690 = 149730

So, 690*217 = 149730