Alright, let's solve this math problem step by step. First, we have the number 880. 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 880 and add it to itself 77 times.
Step 1: 0 + 880 = 880
Step 2: 880 + 880 = 1760
Step 3: 1760 + 880 = 2640
Step 4: 2640 + 880 = 3520
Step 5: 3520 + 880 = 4400
Step 6: 4400 + 880 = 5280
Step 7: 5280 + 880 = 6160
Step 8: 6160 + 880 = 7040
Step 9: 7040 + 880 = 7920
Step 10: 7920 + 880 = 8800
Step 11: 8800 + 880 = 9680
Step 12: 9680 + 880 = 10560
Step 13: 10560 + 880 = 11440
Step 14: 11440 + 880 = 12320
Step 15: 12320 + 880 = 13200
Step 16: 13200 + 880 = 14080
Step 17: 14080 + 880 = 14960
Step 18: 14960 + 880 = 15840
Step 19: 15840 + 880 = 16720
Step 20: 16720 + 880 = 17600
Step 21: 17600 + 880 = 18480
Step 22: 18480 + 880 = 19360
Step 23: 19360 + 880 = 20240
Step 24: 20240 + 880 = 21120
Step 25: 21120 + 880 = 22000
Step 26: 22000 + 880 = 22880
Step 27: 22880 + 880 = 23760
Step 28: 23760 + 880 = 24640
Step 29: 24640 + 880 = 25520
Step 30: 25520 + 880 = 26400
Step 31: 26400 + 880 = 27280
Step 32: 27280 + 880 = 28160
Step 33: 28160 + 880 = 29040
Step 34: 29040 + 880 = 29920
Step 35: 29920 + 880 = 30800
Step 36: 30800 + 880 = 31680
Step 37: 31680 + 880 = 32560
Step 38: 32560 + 880 = 33440
Step 39: 33440 + 880 = 34320
Step 40: 34320 + 880 = 35200
Step 41: 35200 + 880 = 36080
Step 42: 36080 + 880 = 36960
Step 43: 36960 + 880 = 37840
Step 44: 37840 + 880 = 38720
Step 45: 38720 + 880 = 39600
Step 46: 39600 + 880 = 40480
Step 47: 40480 + 880 = 41360
Step 48: 41360 + 880 = 42240
Step 49: 42240 + 880 = 43120
Step 50: 43120 + 880 = 44000
Step 51: 44000 + 880 = 44880
Step 52: 44880 + 880 = 45760
Step 53: 45760 + 880 = 46640
Step 54: 46640 + 880 = 47520
Step 55: 47520 + 880 = 48400
Step 56: 48400 + 880 = 49280
Step 57: 49280 + 880 = 50160
Step 58: 50160 + 880 = 51040
Step 59: 51040 + 880 = 51920
Step 60: 51920 + 880 = 52800
Step 61: 52800 + 880 = 53680
Step 62: 53680 + 880 = 54560
Step 63: 54560 + 880 = 55440
Step 64: 55440 + 880 = 56320
Step 65: 56320 + 880 = 57200
Step 66: 57200 + 880 = 58080
Step 67: 58080 + 880 = 58960
Step 68: 58960 + 880 = 59840
Step 69: 59840 + 880 = 60720
Step 70: 60720 + 880 = 61600
Step 71: 61600 + 880 = 62480
Step 72: 62480 + 880 = 63360
Step 73: 63360 + 880 = 64240
Step 74: 64240 + 880 = 65120
Step 75: 65120 + 880 = 66000
Step 76: 66000 + 880 = 66880
Step 77: 66880 + 880 = 67760

So, 880*77 = 67760