Alright, let's solve this math problem step by step. First, we have the number 680. 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 680 and add it to itself 77 times.
Step 1: 0 + 680 = 680
Step 2: 680 + 680 = 1360
Step 3: 1360 + 680 = 2040
Step 4: 2040 + 680 = 2720
Step 5: 2720 + 680 = 3400
Step 6: 3400 + 680 = 4080
Step 7: 4080 + 680 = 4760
Step 8: 4760 + 680 = 5440
Step 9: 5440 + 680 = 6120
Step 10: 6120 + 680 = 6800
Step 11: 6800 + 680 = 7480
Step 12: 7480 + 680 = 8160
Step 13: 8160 + 680 = 8840
Step 14: 8840 + 680 = 9520
Step 15: 9520 + 680 = 10200
Step 16: 10200 + 680 = 10880
Step 17: 10880 + 680 = 11560
Step 18: 11560 + 680 = 12240
Step 19: 12240 + 680 = 12920
Step 20: 12920 + 680 = 13600
Step 21: 13600 + 680 = 14280
Step 22: 14280 + 680 = 14960
Step 23: 14960 + 680 = 15640
Step 24: 15640 + 680 = 16320
Step 25: 16320 + 680 = 17000
Step 26: 17000 + 680 = 17680
Step 27: 17680 + 680 = 18360
Step 28: 18360 + 680 = 19040
Step 29: 19040 + 680 = 19720
Step 30: 19720 + 680 = 20400
Step 31: 20400 + 680 = 21080
Step 32: 21080 + 680 = 21760
Step 33: 21760 + 680 = 22440
Step 34: 22440 + 680 = 23120
Step 35: 23120 + 680 = 23800
Step 36: 23800 + 680 = 24480
Step 37: 24480 + 680 = 25160
Step 38: 25160 + 680 = 25840
Step 39: 25840 + 680 = 26520
Step 40: 26520 + 680 = 27200
Step 41: 27200 + 680 = 27880
Step 42: 27880 + 680 = 28560
Step 43: 28560 + 680 = 29240
Step 44: 29240 + 680 = 29920
Step 45: 29920 + 680 = 30600
Step 46: 30600 + 680 = 31280
Step 47: 31280 + 680 = 31960
Step 48: 31960 + 680 = 32640
Step 49: 32640 + 680 = 33320
Step 50: 33320 + 680 = 34000
Step 51: 34000 + 680 = 34680
Step 52: 34680 + 680 = 35360
Step 53: 35360 + 680 = 36040
Step 54: 36040 + 680 = 36720
Step 55: 36720 + 680 = 37400
Step 56: 37400 + 680 = 38080
Step 57: 38080 + 680 = 38760
Step 58: 38760 + 680 = 39440
Step 59: 39440 + 680 = 40120
Step 60: 40120 + 680 = 40800
Step 61: 40800 + 680 = 41480
Step 62: 41480 + 680 = 42160
Step 63: 42160 + 680 = 42840
Step 64: 42840 + 680 = 43520
Step 65: 43520 + 680 = 44200
Step 66: 44200 + 680 = 44880
Step 67: 44880 + 680 = 45560
Step 68: 45560 + 680 = 46240
Step 69: 46240 + 680 = 46920
Step 70: 46920 + 680 = 47600
Step 71: 47600 + 680 = 48280
Step 72: 48280 + 680 = 48960
Step 73: 48960 + 680 = 49640
Step 74: 49640 + 680 = 50320
Step 75: 50320 + 680 = 51000
Step 76: 51000 + 680 = 51680
Step 77: 51680 + 680 = 52360

So, 680*77 = 52360