Alright, let's solve this math problem step by step. First, we have the number 72. 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 72 and add it to itself 77 times.
Step 1: 0 + 72 = 72
Step 2: 72 + 72 = 144
Step 3: 144 + 72 = 216
Step 4: 216 + 72 = 288
Step 5: 288 + 72 = 360
Step 6: 360 + 72 = 432
Step 7: 432 + 72 = 504
Step 8: 504 + 72 = 576
Step 9: 576 + 72 = 648
Step 10: 648 + 72 = 720
Step 11: 720 + 72 = 792
Step 12: 792 + 72 = 864
Step 13: 864 + 72 = 936
Step 14: 936 + 72 = 1008
Step 15: 1008 + 72 = 1080
Step 16: 1080 + 72 = 1152
Step 17: 1152 + 72 = 1224
Step 18: 1224 + 72 = 1296
Step 19: 1296 + 72 = 1368
Step 20: 1368 + 72 = 1440
Step 21: 1440 + 72 = 1512
Step 22: 1512 + 72 = 1584
Step 23: 1584 + 72 = 1656
Step 24: 1656 + 72 = 1728
Step 25: 1728 + 72 = 1800
Step 26: 1800 + 72 = 1872
Step 27: 1872 + 72 = 1944
Step 28: 1944 + 72 = 2016
Step 29: 2016 + 72 = 2088
Step 30: 2088 + 72 = 2160
Step 31: 2160 + 72 = 2232
Step 32: 2232 + 72 = 2304
Step 33: 2304 + 72 = 2376
Step 34: 2376 + 72 = 2448
Step 35: 2448 + 72 = 2520
Step 36: 2520 + 72 = 2592
Step 37: 2592 + 72 = 2664
Step 38: 2664 + 72 = 2736
Step 39: 2736 + 72 = 2808
Step 40: 2808 + 72 = 2880
Step 41: 2880 + 72 = 2952
Step 42: 2952 + 72 = 3024
Step 43: 3024 + 72 = 3096
Step 44: 3096 + 72 = 3168
Step 45: 3168 + 72 = 3240
Step 46: 3240 + 72 = 3312
Step 47: 3312 + 72 = 3384
Step 48: 3384 + 72 = 3456
Step 49: 3456 + 72 = 3528
Step 50: 3528 + 72 = 3600
Step 51: 3600 + 72 = 3672
Step 52: 3672 + 72 = 3744
Step 53: 3744 + 72 = 3816
Step 54: 3816 + 72 = 3888
Step 55: 3888 + 72 = 3960
Step 56: 3960 + 72 = 4032
Step 57: 4032 + 72 = 4104
Step 58: 4104 + 72 = 4176
Step 59: 4176 + 72 = 4248
Step 60: 4248 + 72 = 4320
Step 61: 4320 + 72 = 4392
Step 62: 4392 + 72 = 4464
Step 63: 4464 + 72 = 4536
Step 64: 4536 + 72 = 4608
Step 65: 4608 + 72 = 4680
Step 66: 4680 + 72 = 4752
Step 67: 4752 + 72 = 4824
Step 68: 4824 + 72 = 4896
Step 69: 4896 + 72 = 4968
Step 70: 4968 + 72 = 5040
Step 71: 5040 + 72 = 5112
Step 72: 5112 + 72 = 5184
Step 73: 5184 + 72 = 5256
Step 74: 5256 + 72 = 5328
Step 75: 5328 + 72 = 5400
Step 76: 5400 + 72 = 5472
Step 77: 5472 + 72 = 5544

So, 72*77 = 5544