Let's roll up our sleeves and solve this. We have 35 and we're going to multiply it by 159, essentially adding 35 to itself 159 times.
Step 1: 0 + 35 = 35
Step 2: 35 + 35 = 70
Step 3: 70 + 35 = 105
Step 4: 105 + 35 = 140
Step 5: 140 + 35 = 175
Step 6: 175 + 35 = 210
Step 7: 210 + 35 = 245
Step 8: 245 + 35 = 280
Step 9: 280 + 35 = 315
Step 10: 315 + 35 = 350
Step 11: 350 + 35 = 385
Step 12: 385 + 35 = 420
Step 13: 420 + 35 = 455
Step 14: 455 + 35 = 490
Step 15: 490 + 35 = 525
Step 16: 525 + 35 = 560
Step 17: 560 + 35 = 595
Step 18: 595 + 35 = 630
Step 19: 630 + 35 = 665
Step 20: 665 + 35 = 700
Step 21: 700 + 35 = 735
Step 22: 735 + 35 = 770
Step 23: 770 + 35 = 805
Step 24: 805 + 35 = 840
Step 25: 840 + 35 = 875
Step 26: 875 + 35 = 910
Step 27: 910 + 35 = 945
Step 28: 945 + 35 = 980
Step 29: 980 + 35 = 1015
Step 30: 1015 + 35 = 1050
Step 31: 1050 + 35 = 1085
Step 32: 1085 + 35 = 1120
Step 33: 1120 + 35 = 1155
Step 34: 1155 + 35 = 1190
Step 35: 1190 + 35 = 1225
Step 36: 1225 + 35 = 1260
Step 37: 1260 + 35 = 1295
Step 38: 1295 + 35 = 1330
Step 39: 1330 + 35 = 1365
Step 40: 1365 + 35 = 1400
Step 41: 1400 + 35 = 1435
Step 42: 1435 + 35 = 1470
Step 43: 1470 + 35 = 1505
Step 44: 1505 + 35 = 1540
Step 45: 1540 + 35 = 1575
Step 46: 1575 + 35 = 1610
Step 47: 1610 + 35 = 1645
Step 48: 1645 + 35 = 1680
Step 49: 1680 + 35 = 1715
Step 50: 1715 + 35 = 1750
Step 51: 1750 + 35 = 1785
Step 52: 1785 + 35 = 1820
Step 53: 1820 + 35 = 1855
Step 54: 1855 + 35 = 1890
Step 55: 1890 + 35 = 1925
Step 56: 1925 + 35 = 1960
Step 57: 1960 + 35 = 1995
Step 58: 1995 + 35 = 2030
Step 59: 2030 + 35 = 2065
Step 60: 2065 + 35 = 2100
Step 61: 2100 + 35 = 2135
Step 62: 2135 + 35 = 2170
Step 63: 2170 + 35 = 2205
Step 64: 2205 + 35 = 2240
Step 65: 2240 + 35 = 2275
Step 66: 2275 + 35 = 2310
Step 67: 2310 + 35 = 2345
Step 68: 2345 + 35 = 2380
Step 69: 2380 + 35 = 2415
Step 70: 2415 + 35 = 2450
Step 71: 2450 + 35 = 2485
Step 72: 2485 + 35 = 2520
Step 73: 2520 + 35 = 2555
Step 74: 2555 + 35 = 2590
Step 75: 2590 + 35 = 2625
Step 76: 2625 + 35 = 2660
Step 77: 2660 + 35 = 2695
Step 78: 2695 + 35 = 2730
Step 79: 2730 + 35 = 2765
Step 80: 2765 + 35 = 2800
Step 81: 2800 + 35 = 2835
Step 82: 2835 + 35 = 2870
Step 83: 2870 + 35 = 2905
Step 84: 2905 + 35 = 2940
Step 85: 2940 + 35 = 2975
Step 86: 2975 + 35 = 3010
Step 87: 3010 + 35 = 3045
Step 88: 3045 + 35 = 3080
Step 89: 3080 + 35 = 3115
Step 90: 3115 + 35 = 3150
Step 91: 3150 + 35 = 3185
Step 92: 3185 + 35 = 3220
Step 93: 3220 + 35 = 3255
Step 94: 3255 + 35 = 3290
Step 95: 3290 + 35 = 3325
Step 96: 3325 + 35 = 3360
Step 97: 3360 + 35 = 3395
Step 98: 3395 + 35 = 3430
Step 99: 3430 + 35 = 3465
Step 100: 3465 + 35 = 3500
Step 101: 3500 + 35 = 3535
Step 102: 3535 + 35 = 3570
Step 103: 3570 + 35 = 3605
Step 104: 3605 + 35 = 3640
Step 105: 3640 + 35 = 3675
Step 106: 3675 + 35 = 3710
Step 107: 3710 + 35 = 3745
Step 108: 3745 + 35 = 3780
Step 109: 3780 + 35 = 3815
Step 110: 3815 + 35 = 3850
Step 111: 3850 + 35 = 3885
Step 112: 3885 + 35 = 3920
Step 113: 3920 + 35 = 3955
Step 114: 3955 + 35 = 3990
Step 115: 3990 + 35 = 4025
Step 116: 4025 + 35 = 4060
Step 117: 4060 + 35 = 4095
Step 118: 4095 + 35 = 4130
Step 119: 4130 + 35 = 4165
Step 120: 4165 + 35 = 4200
Step 121: 4200 + 35 = 4235
Step 122: 4235 + 35 = 4270
Step 123: 4270 + 35 = 4305
Step 124: 4305 + 35 = 4340
Step 125: 4340 + 35 = 4375
Step 126: 4375 + 35 = 4410
Step 127: 4410 + 35 = 4445
Step 128: 4445 + 35 = 4480
Step 129: 4480 + 35 = 4515
Step 130: 4515 + 35 = 4550
Step 131: 4550 + 35 = 4585
Step 132: 4585 + 35 = 4620
Step 133: 4620 + 35 = 4655
Step 134: 4655 + 35 = 4690
Step 135: 4690 + 35 = 4725
Step 136: 4725 + 35 = 4760
Step 137: 4760 + 35 = 4795
Step 138: 4795 + 35 = 4830
Step 139: 4830 + 35 = 4865
Step 140: 4865 + 35 = 4900
Step 141: 4900 + 35 = 4935
Step 142: 4935 + 35 = 4970
Step 143: 4970 + 35 = 5005
Step 144: 5005 + 35 = 5040
Step 145: 5040 + 35 = 5075
Step 146: 5075 + 35 = 5110
Step 147: 5110 + 35 = 5145
Step 148: 5145 + 35 = 5180
Step 149: 5180 + 35 = 5215
Step 150: 5215 + 35 = 5250
Step 151: 5250 + 35 = 5285
Step 152: 5285 + 35 = 5320
Step 153: 5320 + 35 = 5355
Step 154: 5355 + 35 = 5390
Step 155: 5390 + 35 = 5425
Step 156: 5425 + 35 = 5460
Step 157: 5460 + 35 = 5495
Step 158: 5495 + 35 = 5530
Step 159: 5530 + 35 = 5565

So, 35*159 = 5565