OK, let's work through this together. We're starting with 312 and we're going to multiply it by 208, which means we add 312 to itself 208 times.
Step 1: 0 + 312 = 312
Step 2: 312 + 312 = 624
Step 3: 624 + 312 = 936
Step 4: 936 + 312 = 1248
Step 5: 1248 + 312 = 1560
Step 6: 1560 + 312 = 1872
Step 7: 1872 + 312 = 2184
Step 8: 2184 + 312 = 2496
Step 9: 2496 + 312 = 2808
Step 10: 2808 + 312 = 3120
Step 11: 3120 + 312 = 3432
Step 12: 3432 + 312 = 3744
Step 13: 3744 + 312 = 4056
Step 14: 4056 + 312 = 4368
Step 15: 4368 + 312 = 4680
Step 16: 4680 + 312 = 4992
Step 17: 4992 + 312 = 5304
Step 18: 5304 + 312 = 5616
Step 19: 5616 + 312 = 5928
Step 20: 5928 + 312 = 6240
Step 21: 6240 + 312 = 6552
Step 22: 6552 + 312 = 6864
Step 23: 6864 + 312 = 7176
Step 24: 7176 + 312 = 7488
Step 25: 7488 + 312 = 7800
Step 26: 7800 + 312 = 8112
Step 27: 8112 + 312 = 8424
Step 28: 8424 + 312 = 8736
Step 29: 8736 + 312 = 9048
Step 30: 9048 + 312 = 9360
Step 31: 9360 + 312 = 9672
Step 32: 9672 + 312 = 9984
Step 33: 9984 + 312 = 10296
Step 34: 10296 + 312 = 10608
Step 35: 10608 + 312 = 10920
Step 36: 10920 + 312 = 11232
Step 37: 11232 + 312 = 11544
Step 38: 11544 + 312 = 11856
Step 39: 11856 + 312 = 12168
Step 40: 12168 + 312 = 12480
Step 41: 12480 + 312 = 12792
Step 42: 12792 + 312 = 13104
Step 43: 13104 + 312 = 13416
Step 44: 13416 + 312 = 13728
Step 45: 13728 + 312 = 14040
Step 46: 14040 + 312 = 14352
Step 47: 14352 + 312 = 14664
Step 48: 14664 + 312 = 14976
Step 49: 14976 + 312 = 15288
Step 50: 15288 + 312 = 15600
Step 51: 15600 + 312 = 15912
Step 52: 15912 + 312 = 16224
Step 53: 16224 + 312 = 16536
Step 54: 16536 + 312 = 16848
Step 55: 16848 + 312 = 17160
Step 56: 17160 + 312 = 17472
Step 57: 17472 + 312 = 17784
Step 58: 17784 + 312 = 18096
Step 59: 18096 + 312 = 18408
Step 60: 18408 + 312 = 18720
Step 61: 18720 + 312 = 19032
Step 62: 19032 + 312 = 19344
Step 63: 19344 + 312 = 19656
Step 64: 19656 + 312 = 19968
Step 65: 19968 + 312 = 20280
Step 66: 20280 + 312 = 20592
Step 67: 20592 + 312 = 20904
Step 68: 20904 + 312 = 21216
Step 69: 21216 + 312 = 21528
Step 70: 21528 + 312 = 21840
Step 71: 21840 + 312 = 22152
Step 72: 22152 + 312 = 22464
Step 73: 22464 + 312 = 22776
Step 74: 22776 + 312 = 23088
Step 75: 23088 + 312 = 23400
Step 76: 23400 + 312 = 23712
Step 77: 23712 + 312 = 24024
Step 78: 24024 + 312 = 24336
Step 79: 24336 + 312 = 24648
Step 80: 24648 + 312 = 24960
Step 81: 24960 + 312 = 25272
Step 82: 25272 + 312 = 25584
Step 83: 25584 + 312 = 25896
Step 84: 25896 + 312 = 26208
Step 85: 26208 + 312 = 26520
Step 86: 26520 + 312 = 26832
Step 87: 26832 + 312 = 27144
Step 88: 27144 + 312 = 27456
Step 89: 27456 + 312 = 27768
Step 90: 27768 + 312 = 28080
Step 91: 28080 + 312 = 28392
Step 92: 28392 + 312 = 28704
Step 93: 28704 + 312 = 29016
Step 94: 29016 + 312 = 29328
Step 95: 29328 + 312 = 29640
Step 96: 29640 + 312 = 29952
Step 97: 29952 + 312 = 30264
Step 98: 30264 + 312 = 30576
Step 99: 30576 + 312 = 30888
Step 100: 30888 + 312 = 31200
Step 101: 31200 + 312 = 31512
Step 102: 31512 + 312 = 31824
Step 103: 31824 + 312 = 32136
Step 104: 32136 + 312 = 32448
Step 105: 32448 + 312 = 32760
Step 106: 32760 + 312 = 33072
Step 107: 33072 + 312 = 33384
Step 108: 33384 + 312 = 33696
Step 109: 33696 + 312 = 34008
Step 110: 34008 + 312 = 34320
Step 111: 34320 + 312 = 34632
Step 112: 34632 + 312 = 34944
Step 113: 34944 + 312 = 35256
Step 114: 35256 + 312 = 35568
Step 115: 35568 + 312 = 35880
Step 116: 35880 + 312 = 36192
Step 117: 36192 + 312 = 36504
Step 118: 36504 + 312 = 36816
Step 119: 36816 + 312 = 37128
Step 120: 37128 + 312 = 37440
Step 121: 37440 + 312 = 37752
Step 122: 37752 + 312 = 38064
Step 123: 38064 + 312 = 38376
Step 124: 38376 + 312 = 38688
Step 125: 38688 + 312 = 39000
Step 126: 39000 + 312 = 39312
Step 127: 39312 + 312 = 39624
Step 128: 39624 + 312 = 39936
Step 129: 39936 + 312 = 40248
Step 130: 40248 + 312 = 40560
Step 131: 40560 + 312 = 40872
Step 132: 40872 + 312 = 41184
Step 133: 41184 + 312 = 41496
Step 134: 41496 + 312 = 41808
Step 135: 41808 + 312 = 42120
Step 136: 42120 + 312 = 42432
Step 137: 42432 + 312 = 42744
Step 138: 42744 + 312 = 43056
Step 139: 43056 + 312 = 43368
Step 140: 43368 + 312 = 43680
Step 141: 43680 + 312 = 43992
Step 142: 43992 + 312 = 44304
Step 143: 44304 + 312 = 44616
Step 144: 44616 + 312 = 44928
Step 145: 44928 + 312 = 45240
Step 146: 45240 + 312 = 45552
Step 147: 45552 + 312 = 45864
Step 148: 45864 + 312 = 46176
Step 149: 46176 + 312 = 46488
Step 150: 46488 + 312 = 46800
Step 151: 46800 + 312 = 47112
Step 152: 47112 + 312 = 47424
Step 153: 47424 + 312 = 47736
Step 154: 47736 + 312 = 48048
Step 155: 48048 + 312 = 48360
Step 156: 48360 + 312 = 48672
Step 157: 48672 + 312 = 48984
Step 158: 48984 + 312 = 49296
Step 159: 49296 + 312 = 49608
Step 160: 49608 + 312 = 49920
Step 161: 49920 + 312 = 50232
Step 162: 50232 + 312 = 50544
Step 163: 50544 + 312 = 50856
Step 164: 50856 + 312 = 51168
Step 165: 51168 + 312 = 51480
Step 166: 51480 + 312 = 51792
Step 167: 51792 + 312 = 52104
Step 168: 52104 + 312 = 52416
Step 169: 52416 + 312 = 52728
Step 170: 52728 + 312 = 53040
Step 171: 53040 + 312 = 53352
Step 172: 53352 + 312 = 53664
Step 173: 53664 + 312 = 53976
Step 174: 53976 + 312 = 54288
Step 175: 54288 + 312 = 54600
Step 176: 54600 + 312 = 54912
Step 177: 54912 + 312 = 55224
Step 178: 55224 + 312 = 55536
Step 179: 55536 + 312 = 55848
Step 180: 55848 + 312 = 56160
Step 181: 56160 + 312 = 56472
Step 182: 56472 + 312 = 56784
Step 183: 56784 + 312 = 57096
Step 184: 57096 + 312 = 57408
Step 185: 57408 + 312 = 57720
Step 186: 57720 + 312 = 58032
Step 187: 58032 + 312 = 58344
Step 188: 58344 + 312 = 58656
Step 189: 58656 + 312 = 58968
Step 190: 58968 + 312 = 59280
Step 191: 59280 + 312 = 59592
Step 192: 59592 + 312 = 59904
Step 193: 59904 + 312 = 60216
Step 194: 60216 + 312 = 60528
Step 195: 60528 + 312 = 60840
Step 196: 60840 + 312 = 61152
Step 197: 61152 + 312 = 61464
Step 198: 61464 + 312 = 61776
Step 199: 61776 + 312 = 62088
Step 200: 62088 + 312 = 62400
Step 201: 62400 + 312 = 62712
Step 202: 62712 + 312 = 63024
Step 203: 63024 + 312 = 63336
Step 204: 63336 + 312 = 63648
Step 205: 63648 + 312 = 63960
Step 206: 63960 + 312 = 64272
Step 207: 64272 + 312 = 64584
Step 208: 64584 + 312 = 64896

So, 312*208 = 64896