Alright, let's solve this math problem step by step. First, we have the number 660. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 258. So, we're going to take the number 660 and add it to itself 258 times.
Step 1: 0 + 660 = 660
Step 2: 660 + 660 = 1320
Step 3: 1320 + 660 = 1980
Step 4: 1980 + 660 = 2640
Step 5: 2640 + 660 = 3300
Step 6: 3300 + 660 = 3960
Step 7: 3960 + 660 = 4620
Step 8: 4620 + 660 = 5280
Step 9: 5280 + 660 = 5940
Step 10: 5940 + 660 = 6600
Step 11: 6600 + 660 = 7260
Step 12: 7260 + 660 = 7920
Step 13: 7920 + 660 = 8580
Step 14: 8580 + 660 = 9240
Step 15: 9240 + 660 = 9900
Step 16: 9900 + 660 = 10560
Step 17: 10560 + 660 = 11220
Step 18: 11220 + 660 = 11880
Step 19: 11880 + 660 = 12540
Step 20: 12540 + 660 = 13200
Step 21: 13200 + 660 = 13860
Step 22: 13860 + 660 = 14520
Step 23: 14520 + 660 = 15180
Step 24: 15180 + 660 = 15840
Step 25: 15840 + 660 = 16500
Step 26: 16500 + 660 = 17160
Step 27: 17160 + 660 = 17820
Step 28: 17820 + 660 = 18480
Step 29: 18480 + 660 = 19140
Step 30: 19140 + 660 = 19800
Step 31: 19800 + 660 = 20460
Step 32: 20460 + 660 = 21120
Step 33: 21120 + 660 = 21780
Step 34: 21780 + 660 = 22440
Step 35: 22440 + 660 = 23100
Step 36: 23100 + 660 = 23760
Step 37: 23760 + 660 = 24420
Step 38: 24420 + 660 = 25080
Step 39: 25080 + 660 = 25740
Step 40: 25740 + 660 = 26400
Step 41: 26400 + 660 = 27060
Step 42: 27060 + 660 = 27720
Step 43: 27720 + 660 = 28380
Step 44: 28380 + 660 = 29040
Step 45: 29040 + 660 = 29700
Step 46: 29700 + 660 = 30360
Step 47: 30360 + 660 = 31020
Step 48: 31020 + 660 = 31680
Step 49: 31680 + 660 = 32340
Step 50: 32340 + 660 = 33000
Step 51: 33000 + 660 = 33660
Step 52: 33660 + 660 = 34320
Step 53: 34320 + 660 = 34980
Step 54: 34980 + 660 = 35640
Step 55: 35640 + 660 = 36300
Step 56: 36300 + 660 = 36960
Step 57: 36960 + 660 = 37620
Step 58: 37620 + 660 = 38280
Step 59: 38280 + 660 = 38940
Step 60: 38940 + 660 = 39600
Step 61: 39600 + 660 = 40260
Step 62: 40260 + 660 = 40920
Step 63: 40920 + 660 = 41580
Step 64: 41580 + 660 = 42240
Step 65: 42240 + 660 = 42900
Step 66: 42900 + 660 = 43560
Step 67: 43560 + 660 = 44220
Step 68: 44220 + 660 = 44880
Step 69: 44880 + 660 = 45540
Step 70: 45540 + 660 = 46200
Step 71: 46200 + 660 = 46860
Step 72: 46860 + 660 = 47520
Step 73: 47520 + 660 = 48180
Step 74: 48180 + 660 = 48840
Step 75: 48840 + 660 = 49500
Step 76: 49500 + 660 = 50160
Step 77: 50160 + 660 = 50820
Step 78: 50820 + 660 = 51480
Step 79: 51480 + 660 = 52140
Step 80: 52140 + 660 = 52800
Step 81: 52800 + 660 = 53460
Step 82: 53460 + 660 = 54120
Step 83: 54120 + 660 = 54780
Step 84: 54780 + 660 = 55440
Step 85: 55440 + 660 = 56100
Step 86: 56100 + 660 = 56760
Step 87: 56760 + 660 = 57420
Step 88: 57420 + 660 = 58080
Step 89: 58080 + 660 = 58740
Step 90: 58740 + 660 = 59400
Step 91: 59400 + 660 = 60060
Step 92: 60060 + 660 = 60720
Step 93: 60720 + 660 = 61380
Step 94: 61380 + 660 = 62040
Step 95: 62040 + 660 = 62700
Step 96: 62700 + 660 = 63360
Step 97: 63360 + 660 = 64020
Step 98: 64020 + 660 = 64680
Step 99: 64680 + 660 = 65340
Step 100: 65340 + 660 = 66000
Step 101: 66000 + 660 = 66660
Step 102: 66660 + 660 = 67320
Step 103: 67320 + 660 = 67980
Step 104: 67980 + 660 = 68640
Step 105: 68640 + 660 = 69300
Step 106: 69300 + 660 = 69960
Step 107: 69960 + 660 = 70620
Step 108: 70620 + 660 = 71280
Step 109: 71280 + 660 = 71940
Step 110: 71940 + 660 = 72600
Step 111: 72600 + 660 = 73260
Step 112: 73260 + 660 = 73920
Step 113: 73920 + 660 = 74580
Step 114: 74580 + 660 = 75240
Step 115: 75240 + 660 = 75900
Step 116: 75900 + 660 = 76560
Step 117: 76560 + 660 = 77220
Step 118: 77220 + 660 = 77880
Step 119: 77880 + 660 = 78540
Step 120: 78540 + 660 = 79200
Step 121: 79200 + 660 = 79860
Step 122: 79860 + 660 = 80520
Step 123: 80520 + 660 = 81180
Step 124: 81180 + 660 = 81840
Step 125: 81840 + 660 = 82500
Step 126: 82500 + 660 = 83160
Step 127: 83160 + 660 = 83820
Step 128: 83820 + 660 = 84480
Step 129: 84480 + 660 = 85140
Step 130: 85140 + 660 = 85800
Step 131: 85800 + 660 = 86460
Step 132: 86460 + 660 = 87120
Step 133: 87120 + 660 = 87780
Step 134: 87780 + 660 = 88440
Step 135: 88440 + 660 = 89100
Step 136: 89100 + 660 = 89760
Step 137: 89760 + 660 = 90420
Step 138: 90420 + 660 = 91080
Step 139: 91080 + 660 = 91740
Step 140: 91740 + 660 = 92400
Step 141: 92400 + 660 = 93060
Step 142: 93060 + 660 = 93720
Step 143: 93720 + 660 = 94380
Step 144: 94380 + 660 = 95040
Step 145: 95040 + 660 = 95700
Step 146: 95700 + 660 = 96360
Step 147: 96360 + 660 = 97020
Step 148: 97020 + 660 = 97680
Step 149: 97680 + 660 = 98340
Step 150: 98340 + 660 = 99000
Step 151: 99000 + 660 = 99660
Step 152: 99660 + 660 = 100320
Step 153: 100320 + 660 = 100980
Step 154: 100980 + 660 = 101640
Step 155: 101640 + 660 = 102300
Step 156: 102300 + 660 = 102960
Step 157: 102960 + 660 = 103620
Step 158: 103620 + 660 = 104280
Step 159: 104280 + 660 = 104940
Step 160: 104940 + 660 = 105600
Step 161: 105600 + 660 = 106260
Step 162: 106260 + 660 = 106920
Step 163: 106920 + 660 = 107580
Step 164: 107580 + 660 = 108240
Step 165: 108240 + 660 = 108900
Step 166: 108900 + 660 = 109560
Step 167: 109560 + 660 = 110220
Step 168: 110220 + 660 = 110880
Step 169: 110880 + 660 = 111540
Step 170: 111540 + 660 = 112200
Step 171: 112200 + 660 = 112860
Step 172: 112860 + 660 = 113520
Step 173: 113520 + 660 = 114180
Step 174: 114180 + 660 = 114840
Step 175: 114840 + 660 = 115500
Step 176: 115500 + 660 = 116160
Step 177: 116160 + 660 = 116820
Step 178: 116820 + 660 = 117480
Step 179: 117480 + 660 = 118140
Step 180: 118140 + 660 = 118800
Step 181: 118800 + 660 = 119460
Step 182: 119460 + 660 = 120120
Step 183: 120120 + 660 = 120780
Step 184: 120780 + 660 = 121440
Step 185: 121440 + 660 = 122100
Step 186: 122100 + 660 = 122760
Step 187: 122760 + 660 = 123420
Step 188: 123420 + 660 = 124080
Step 189: 124080 + 660 = 124740
Step 190: 124740 + 660 = 125400
Step 191: 125400 + 660 = 126060
Step 192: 126060 + 660 = 126720
Step 193: 126720 + 660 = 127380
Step 194: 127380 + 660 = 128040
Step 195: 128040 + 660 = 128700
Step 196: 128700 + 660 = 129360
Step 197: 129360 + 660 = 130020
Step 198: 130020 + 660 = 130680
Step 199: 130680 + 660 = 131340
Step 200: 131340 + 660 = 132000
Step 201: 132000 + 660 = 132660
Step 202: 132660 + 660 = 133320
Step 203: 133320 + 660 = 133980
Step 204: 133980 + 660 = 134640
Step 205: 134640 + 660 = 135300
Step 206: 135300 + 660 = 135960
Step 207: 135960 + 660 = 136620
Step 208: 136620 + 660 = 137280
Step 209: 137280 + 660 = 137940
Step 210: 137940 + 660 = 138600
Step 211: 138600 + 660 = 139260
Step 212: 139260 + 660 = 139920
Step 213: 139920 + 660 = 140580
Step 214: 140580 + 660 = 141240
Step 215: 141240 + 660 = 141900
Step 216: 141900 + 660 = 142560
Step 217: 142560 + 660 = 143220
Step 218: 143220 + 660 = 143880
Step 219: 143880 + 660 = 144540
Step 220: 144540 + 660 = 145200
Step 221: 145200 + 660 = 145860
Step 222: 145860 + 660 = 146520
Step 223: 146520 + 660 = 147180
Step 224: 147180 + 660 = 147840
Step 225: 147840 + 660 = 148500
Step 226: 148500 + 660 = 149160
Step 227: 149160 + 660 = 149820
Step 228: 149820 + 660 = 150480
Step 229: 150480 + 660 = 151140
Step 230: 151140 + 660 = 151800
Step 231: 151800 + 660 = 152460
Step 232: 152460 + 660 = 153120
Step 233: 153120 + 660 = 153780
Step 234: 153780 + 660 = 154440
Step 235: 154440 + 660 = 155100
Step 236: 155100 + 660 = 155760
Step 237: 155760 + 660 = 156420
Step 238: 156420 + 660 = 157080
Step 239: 157080 + 660 = 157740
Step 240: 157740 + 660 = 158400
Step 241: 158400 + 660 = 159060
Step 242: 159060 + 660 = 159720
Step 243: 159720 + 660 = 160380
Step 244: 160380 + 660 = 161040
Step 245: 161040 + 660 = 161700
Step 246: 161700 + 660 = 162360
Step 247: 162360 + 660 = 163020
Step 248: 163020 + 660 = 163680
Step 249: 163680 + 660 = 164340
Step 250: 164340 + 660 = 165000
Step 251: 165000 + 660 = 165660
Step 252: 165660 + 660 = 166320
Step 253: 166320 + 660 = 166980
Step 254: 166980 + 660 = 167640
Step 255: 167640 + 660 = 168300
Step 256: 168300 + 660 = 168960
Step 257: 168960 + 660 = 169620
Step 258: 169620 + 660 = 170280

So, 660*258 = 170280