Alright, let's solve this math problem step by step. First, we have the number 156. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 77. So, we're going to take the number 156 and add it to itself 77 times.
Step 1: 0 + 156 = 156
Step 2: 156 + 156 = 312
Step 3: 312 + 156 = 468
Step 4: 468 + 156 = 624
Step 5: 624 + 156 = 780
Step 6: 780 + 156 = 936
Step 7: 936 + 156 = 1092
Step 8: 1092 + 156 = 1248
Step 9: 1248 + 156 = 1404
Step 10: 1404 + 156 = 1560
Step 11: 1560 + 156 = 1716
Step 12: 1716 + 156 = 1872
Step 13: 1872 + 156 = 2028
Step 14: 2028 + 156 = 2184
Step 15: 2184 + 156 = 2340
Step 16: 2340 + 156 = 2496
Step 17: 2496 + 156 = 2652
Step 18: 2652 + 156 = 2808
Step 19: 2808 + 156 = 2964
Step 20: 2964 + 156 = 3120
Step 21: 3120 + 156 = 3276
Step 22: 3276 + 156 = 3432
Step 23: 3432 + 156 = 3588
Step 24: 3588 + 156 = 3744
Step 25: 3744 + 156 = 3900
Step 26: 3900 + 156 = 4056
Step 27: 4056 + 156 = 4212
Step 28: 4212 + 156 = 4368
Step 29: 4368 + 156 = 4524
Step 30: 4524 + 156 = 4680
Step 31: 4680 + 156 = 4836
Step 32: 4836 + 156 = 4992
Step 33: 4992 + 156 = 5148
Step 34: 5148 + 156 = 5304
Step 35: 5304 + 156 = 5460
Step 36: 5460 + 156 = 5616
Step 37: 5616 + 156 = 5772
Step 38: 5772 + 156 = 5928
Step 39: 5928 + 156 = 6084
Step 40: 6084 + 156 = 6240
Step 41: 6240 + 156 = 6396
Step 42: 6396 + 156 = 6552
Step 43: 6552 + 156 = 6708
Step 44: 6708 + 156 = 6864
Step 45: 6864 + 156 = 7020
Step 46: 7020 + 156 = 7176
Step 47: 7176 + 156 = 7332
Step 48: 7332 + 156 = 7488
Step 49: 7488 + 156 = 7644
Step 50: 7644 + 156 = 7800
Step 51: 7800 + 156 = 7956
Step 52: 7956 + 156 = 8112
Step 53: 8112 + 156 = 8268
Step 54: 8268 + 156 = 8424
Step 55: 8424 + 156 = 8580
Step 56: 8580 + 156 = 8736
Step 57: 8736 + 156 = 8892
Step 58: 8892 + 156 = 9048
Step 59: 9048 + 156 = 9204
Step 60: 9204 + 156 = 9360
Step 61: 9360 + 156 = 9516
Step 62: 9516 + 156 = 9672
Step 63: 9672 + 156 = 9828
Step 64: 9828 + 156 = 9984
Step 65: 9984 + 156 = 10140
Step 66: 10140 + 156 = 10296
Step 67: 10296 + 156 = 10452
Step 68: 10452 + 156 = 10608
Step 69: 10608 + 156 = 10764
Step 70: 10764 + 156 = 10920
Step 71: 10920 + 156 = 11076
Step 72: 11076 + 156 = 11232
Step 73: 11232 + 156 = 11388
Step 74: 11388 + 156 = 11544
Step 75: 11544 + 156 = 11700
Step 76: 11700 + 156 = 11856
Step 77: 11856 + 156 = 12012

So, 156*77 = 12012