OK, let's work through this together. We're starting with 65 and we're going to multiply it by 335, which means we add 65 to itself 335 times.
Step 1: 0 + 65 = 65
Step 2: 65 + 65 = 130
Step 3: 130 + 65 = 195
Step 4: 195 + 65 = 260
Step 5: 260 + 65 = 325
Step 6: 325 + 65 = 390
Step 7: 390 + 65 = 455
Step 8: 455 + 65 = 520
Step 9: 520 + 65 = 585
Step 10: 585 + 65 = 650
Step 11: 650 + 65 = 715
Step 12: 715 + 65 = 780
Step 13: 780 + 65 = 845
Step 14: 845 + 65 = 910
Step 15: 910 + 65 = 975
Step 16: 975 + 65 = 1040
Step 17: 1040 + 65 = 1105
Step 18: 1105 + 65 = 1170
Step 19: 1170 + 65 = 1235
Step 20: 1235 + 65 = 1300
Step 21: 1300 + 65 = 1365
Step 22: 1365 + 65 = 1430
Step 23: 1430 + 65 = 1495
Step 24: 1495 + 65 = 1560
Step 25: 1560 + 65 = 1625
Step 26: 1625 + 65 = 1690
Step 27: 1690 + 65 = 1755
Step 28: 1755 + 65 = 1820
Step 29: 1820 + 65 = 1885
Step 30: 1885 + 65 = 1950
Step 31: 1950 + 65 = 2015
Step 32: 2015 + 65 = 2080
Step 33: 2080 + 65 = 2145
Step 34: 2145 + 65 = 2210
Step 35: 2210 + 65 = 2275
Step 36: 2275 + 65 = 2340
Step 37: 2340 + 65 = 2405
Step 38: 2405 + 65 = 2470
Step 39: 2470 + 65 = 2535
Step 40: 2535 + 65 = 2600
Step 41: 2600 + 65 = 2665
Step 42: 2665 + 65 = 2730
Step 43: 2730 + 65 = 2795
Step 44: 2795 + 65 = 2860
Step 45: 2860 + 65 = 2925
Step 46: 2925 + 65 = 2990
Step 47: 2990 + 65 = 3055
Step 48: 3055 + 65 = 3120
Step 49: 3120 + 65 = 3185
Step 50: 3185 + 65 = 3250
Step 51: 3250 + 65 = 3315
Step 52: 3315 + 65 = 3380
Step 53: 3380 + 65 = 3445
Step 54: 3445 + 65 = 3510
Step 55: 3510 + 65 = 3575
Step 56: 3575 + 65 = 3640
Step 57: 3640 + 65 = 3705
Step 58: 3705 + 65 = 3770
Step 59: 3770 + 65 = 3835
Step 60: 3835 + 65 = 3900
Step 61: 3900 + 65 = 3965
Step 62: 3965 + 65 = 4030
Step 63: 4030 + 65 = 4095
Step 64: 4095 + 65 = 4160
Step 65: 4160 + 65 = 4225
Step 66: 4225 + 65 = 4290
Step 67: 4290 + 65 = 4355
Step 68: 4355 + 65 = 4420
Step 69: 4420 + 65 = 4485
Step 70: 4485 + 65 = 4550
Step 71: 4550 + 65 = 4615
Step 72: 4615 + 65 = 4680
Step 73: 4680 + 65 = 4745
Step 74: 4745 + 65 = 4810
Step 75: 4810 + 65 = 4875
Step 76: 4875 + 65 = 4940
Step 77: 4940 + 65 = 5005
Step 78: 5005 + 65 = 5070
Step 79: 5070 + 65 = 5135
Step 80: 5135 + 65 = 5200
Step 81: 5200 + 65 = 5265
Step 82: 5265 + 65 = 5330
Step 83: 5330 + 65 = 5395
Step 84: 5395 + 65 = 5460
Step 85: 5460 + 65 = 5525
Step 86: 5525 + 65 = 5590
Step 87: 5590 + 65 = 5655
Step 88: 5655 + 65 = 5720
Step 89: 5720 + 65 = 5785
Step 90: 5785 + 65 = 5850
Step 91: 5850 + 65 = 5915
Step 92: 5915 + 65 = 5980
Step 93: 5980 + 65 = 6045
Step 94: 6045 + 65 = 6110
Step 95: 6110 + 65 = 6175
Step 96: 6175 + 65 = 6240
Step 97: 6240 + 65 = 6305
Step 98: 6305 + 65 = 6370
Step 99: 6370 + 65 = 6435
Step 100: 6435 + 65 = 6500
Step 101: 6500 + 65 = 6565
Step 102: 6565 + 65 = 6630
Step 103: 6630 + 65 = 6695
Step 104: 6695 + 65 = 6760
Step 105: 6760 + 65 = 6825
Step 106: 6825 + 65 = 6890
Step 107: 6890 + 65 = 6955
Step 108: 6955 + 65 = 7020
Step 109: 7020 + 65 = 7085
Step 110: 7085 + 65 = 7150
Step 111: 7150 + 65 = 7215
Step 112: 7215 + 65 = 7280
Step 113: 7280 + 65 = 7345
Step 114: 7345 + 65 = 7410
Step 115: 7410 + 65 = 7475
Step 116: 7475 + 65 = 7540
Step 117: 7540 + 65 = 7605
Step 118: 7605 + 65 = 7670
Step 119: 7670 + 65 = 7735
Step 120: 7735 + 65 = 7800
Step 121: 7800 + 65 = 7865
Step 122: 7865 + 65 = 7930
Step 123: 7930 + 65 = 7995
Step 124: 7995 + 65 = 8060
Step 125: 8060 + 65 = 8125
Step 126: 8125 + 65 = 8190
Step 127: 8190 + 65 = 8255
Step 128: 8255 + 65 = 8320
Step 129: 8320 + 65 = 8385
Step 130: 8385 + 65 = 8450
Step 131: 8450 + 65 = 8515
Step 132: 8515 + 65 = 8580
Step 133: 8580 + 65 = 8645
Step 134: 8645 + 65 = 8710
Step 135: 8710 + 65 = 8775
Step 136: 8775 + 65 = 8840
Step 137: 8840 + 65 = 8905
Step 138: 8905 + 65 = 8970
Step 139: 8970 + 65 = 9035
Step 140: 9035 + 65 = 9100
Step 141: 9100 + 65 = 9165
Step 142: 9165 + 65 = 9230
Step 143: 9230 + 65 = 9295
Step 144: 9295 + 65 = 9360
Step 145: 9360 + 65 = 9425
Step 146: 9425 + 65 = 9490
Step 147: 9490 + 65 = 9555
Step 148: 9555 + 65 = 9620
Step 149: 9620 + 65 = 9685
Step 150: 9685 + 65 = 9750
Step 151: 9750 + 65 = 9815
Step 152: 9815 + 65 = 9880
Step 153: 9880 + 65 = 9945
Step 154: 9945 + 65 = 10010
Step 155: 10010 + 65 = 10075
Step 156: 10075 + 65 = 10140
Step 157: 10140 + 65 = 10205
Step 158: 10205 + 65 = 10270
Step 159: 10270 + 65 = 10335
Step 160: 10335 + 65 = 10400
Step 161: 10400 + 65 = 10465
Step 162: 10465 + 65 = 10530
Step 163: 10530 + 65 = 10595
Step 164: 10595 + 65 = 10660
Step 165: 10660 + 65 = 10725
Step 166: 10725 + 65 = 10790
Step 167: 10790 + 65 = 10855
Step 168: 10855 + 65 = 10920
Step 169: 10920 + 65 = 10985
Step 170: 10985 + 65 = 11050
Step 171: 11050 + 65 = 11115
Step 172: 11115 + 65 = 11180
Step 173: 11180 + 65 = 11245
Step 174: 11245 + 65 = 11310
Step 175: 11310 + 65 = 11375
Step 176: 11375 + 65 = 11440
Step 177: 11440 + 65 = 11505
Step 178: 11505 + 65 = 11570
Step 179: 11570 + 65 = 11635
Step 180: 11635 + 65 = 11700
Step 181: 11700 + 65 = 11765
Step 182: 11765 + 65 = 11830
Step 183: 11830 + 65 = 11895
Step 184: 11895 + 65 = 11960
Step 185: 11960 + 65 = 12025
Step 186: 12025 + 65 = 12090
Step 187: 12090 + 65 = 12155
Step 188: 12155 + 65 = 12220
Step 189: 12220 + 65 = 12285
Step 190: 12285 + 65 = 12350
Step 191: 12350 + 65 = 12415
Step 192: 12415 + 65 = 12480
Step 193: 12480 + 65 = 12545
Step 194: 12545 + 65 = 12610
Step 195: 12610 + 65 = 12675
Step 196: 12675 + 65 = 12740
Step 197: 12740 + 65 = 12805
Step 198: 12805 + 65 = 12870
Step 199: 12870 + 65 = 12935
Step 200: 12935 + 65 = 13000
Step 201: 13000 + 65 = 13065
Step 202: 13065 + 65 = 13130
Step 203: 13130 + 65 = 13195
Step 204: 13195 + 65 = 13260
Step 205: 13260 + 65 = 13325
Step 206: 13325 + 65 = 13390
Step 207: 13390 + 65 = 13455
Step 208: 13455 + 65 = 13520
Step 209: 13520 + 65 = 13585
Step 210: 13585 + 65 = 13650
Step 211: 13650 + 65 = 13715
Step 212: 13715 + 65 = 13780
Step 213: 13780 + 65 = 13845
Step 214: 13845 + 65 = 13910
Step 215: 13910 + 65 = 13975
Step 216: 13975 + 65 = 14040
Step 217: 14040 + 65 = 14105
Step 218: 14105 + 65 = 14170
Step 219: 14170 + 65 = 14235
Step 220: 14235 + 65 = 14300
Step 221: 14300 + 65 = 14365
Step 222: 14365 + 65 = 14430
Step 223: 14430 + 65 = 14495
Step 224: 14495 + 65 = 14560
Step 225: 14560 + 65 = 14625
Step 226: 14625 + 65 = 14690
Step 227: 14690 + 65 = 14755
Step 228: 14755 + 65 = 14820
Step 229: 14820 + 65 = 14885
Step 230: 14885 + 65 = 14950
Step 231: 14950 + 65 = 15015
Step 232: 15015 + 65 = 15080
Step 233: 15080 + 65 = 15145
Step 234: 15145 + 65 = 15210
Step 235: 15210 + 65 = 15275
Step 236: 15275 + 65 = 15340
Step 237: 15340 + 65 = 15405
Step 238: 15405 + 65 = 15470
Step 239: 15470 + 65 = 15535
Step 240: 15535 + 65 = 15600
Step 241: 15600 + 65 = 15665
Step 242: 15665 + 65 = 15730
Step 243: 15730 + 65 = 15795
Step 244: 15795 + 65 = 15860
Step 245: 15860 + 65 = 15925
Step 246: 15925 + 65 = 15990
Step 247: 15990 + 65 = 16055
Step 248: 16055 + 65 = 16120
Step 249: 16120 + 65 = 16185
Step 250: 16185 + 65 = 16250
Step 251: 16250 + 65 = 16315
Step 252: 16315 + 65 = 16380
Step 253: 16380 + 65 = 16445
Step 254: 16445 + 65 = 16510
Step 255: 16510 + 65 = 16575
Step 256: 16575 + 65 = 16640
Step 257: 16640 + 65 = 16705
Step 258: 16705 + 65 = 16770
Step 259: 16770 + 65 = 16835
Step 260: 16835 + 65 = 16900
Step 261: 16900 + 65 = 16965
Step 262: 16965 + 65 = 17030
Step 263: 17030 + 65 = 17095
Step 264: 17095 + 65 = 17160
Step 265: 17160 + 65 = 17225
Step 266: 17225 + 65 = 17290
Step 267: 17290 + 65 = 17355
Step 268: 17355 + 65 = 17420
Step 269: 17420 + 65 = 17485
Step 270: 17485 + 65 = 17550
Step 271: 17550 + 65 = 17615
Step 272: 17615 + 65 = 17680
Step 273: 17680 + 65 = 17745
Step 274: 17745 + 65 = 17810
Step 275: 17810 + 65 = 17875
Step 276: 17875 + 65 = 17940
Step 277: 17940 + 65 = 18005
Step 278: 18005 + 65 = 18070
Step 279: 18070 + 65 = 18135
Step 280: 18135 + 65 = 18200
Step 281: 18200 + 65 = 18265
Step 282: 18265 + 65 = 18330
Step 283: 18330 + 65 = 18395
Step 284: 18395 + 65 = 18460
Step 285: 18460 + 65 = 18525
Step 286: 18525 + 65 = 18590
Step 287: 18590 + 65 = 18655
Step 288: 18655 + 65 = 18720
Step 289: 18720 + 65 = 18785
Step 290: 18785 + 65 = 18850
Step 291: 18850 + 65 = 18915
Step 292: 18915 + 65 = 18980
Step 293: 18980 + 65 = 19045
Step 294: 19045 + 65 = 19110
Step 295: 19110 + 65 = 19175
Step 296: 19175 + 65 = 19240
Step 297: 19240 + 65 = 19305
Step 298: 19305 + 65 = 19370
Step 299: 19370 + 65 = 19435
Step 300: 19435 + 65 = 19500
Step 301: 19500 + 65 = 19565
Step 302: 19565 + 65 = 19630
Step 303: 19630 + 65 = 19695
Step 304: 19695 + 65 = 19760
Step 305: 19760 + 65 = 19825
Step 306: 19825 + 65 = 19890
Step 307: 19890 + 65 = 19955
Step 308: 19955 + 65 = 20020
Step 309: 20020 + 65 = 20085
Step 310: 20085 + 65 = 20150
Step 311: 20150 + 65 = 20215
Step 312: 20215 + 65 = 20280
Step 313: 20280 + 65 = 20345
Step 314: 20345 + 65 = 20410
Step 315: 20410 + 65 = 20475
Step 316: 20475 + 65 = 20540
Step 317: 20540 + 65 = 20605
Step 318: 20605 + 65 = 20670
Step 319: 20670 + 65 = 20735
Step 320: 20735 + 65 = 20800
Step 321: 20800 + 65 = 20865
Step 322: 20865 + 65 = 20930
Step 323: 20930 + 65 = 20995
Step 324: 20995 + 65 = 21060
Step 325: 21060 + 65 = 21125
Step 326: 21125 + 65 = 21190
Step 327: 21190 + 65 = 21255
Step 328: 21255 + 65 = 21320
Step 329: 21320 + 65 = 21385
Step 330: 21385 + 65 = 21450
Step 331: 21450 + 65 = 21515
Step 332: 21515 + 65 = 21580
Step 333: 21580 + 65 = 21645
Step 334: 21645 + 65 = 21710
Step 335: 21710 + 65 = 21775

So, 65*335 = 21775