Alright, let's solve this math problem step by step. First, we have the number 312. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 84. So, we're going to take the number 312 and add it to itself 84 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

So, 312*84 = 26208