Alright, let's solve this math problem step by step. First, we have the number 867. Next, we see the multiplication sign, which means we need to multiply something. And what are we multiplying it by? We multiply it by 78. So, we're going to take the number 867 and add it to itself 78 times.
Step 1: 0 + 867 = 867
Step 2: 867 + 867 = 1734
Step 3: 1734 + 867 = 2601
Step 4: 2601 + 867 = 3468
Step 5: 3468 + 867 = 4335
Step 6: 4335 + 867 = 5202
Step 7: 5202 + 867 = 6069
Step 8: 6069 + 867 = 6936
Step 9: 6936 + 867 = 7803
Step 10: 7803 + 867 = 8670
Step 11: 8670 + 867 = 9537
Step 12: 9537 + 867 = 10404
Step 13: 10404 + 867 = 11271
Step 14: 11271 + 867 = 12138
Step 15: 12138 + 867 = 13005
Step 16: 13005 + 867 = 13872
Step 17: 13872 + 867 = 14739
Step 18: 14739 + 867 = 15606
Step 19: 15606 + 867 = 16473
Step 20: 16473 + 867 = 17340
Step 21: 17340 + 867 = 18207
Step 22: 18207 + 867 = 19074
Step 23: 19074 + 867 = 19941
Step 24: 19941 + 867 = 20808
Step 25: 20808 + 867 = 21675
Step 26: 21675 + 867 = 22542
Step 27: 22542 + 867 = 23409
Step 28: 23409 + 867 = 24276
Step 29: 24276 + 867 = 25143
Step 30: 25143 + 867 = 26010
Step 31: 26010 + 867 = 26877
Step 32: 26877 + 867 = 27744
Step 33: 27744 + 867 = 28611
Step 34: 28611 + 867 = 29478
Step 35: 29478 + 867 = 30345
Step 36: 30345 + 867 = 31212
Step 37: 31212 + 867 = 32079
Step 38: 32079 + 867 = 32946
Step 39: 32946 + 867 = 33813
Step 40: 33813 + 867 = 34680
Step 41: 34680 + 867 = 35547
Step 42: 35547 + 867 = 36414
Step 43: 36414 + 867 = 37281
Step 44: 37281 + 867 = 38148
Step 45: 38148 + 867 = 39015
Step 46: 39015 + 867 = 39882
Step 47: 39882 + 867 = 40749
Step 48: 40749 + 867 = 41616
Step 49: 41616 + 867 = 42483
Step 50: 42483 + 867 = 43350
Step 51: 43350 + 867 = 44217
Step 52: 44217 + 867 = 45084
Step 53: 45084 + 867 = 45951
Step 54: 45951 + 867 = 46818
Step 55: 46818 + 867 = 47685
Step 56: 47685 + 867 = 48552
Step 57: 48552 + 867 = 49419
Step 58: 49419 + 867 = 50286
Step 59: 50286 + 867 = 51153
Step 60: 51153 + 867 = 52020
Step 61: 52020 + 867 = 52887
Step 62: 52887 + 867 = 53754
Step 63: 53754 + 867 = 54621
Step 64: 54621 + 867 = 55488
Step 65: 55488 + 867 = 56355
Step 66: 56355 + 867 = 57222
Step 67: 57222 + 867 = 58089
Step 68: 58089 + 867 = 58956
Step 69: 58956 + 867 = 59823
Step 70: 59823 + 867 = 60690
Step 71: 60690 + 867 = 61557
Step 72: 61557 + 867 = 62424
Step 73: 62424 + 867 = 63291
Step 74: 63291 + 867 = 64158
Step 75: 64158 + 867 = 65025
Step 76: 65025 + 867 = 65892
Step 77: 65892 + 867 = 66759
Step 78: 66759 + 867 = 67626

So, 867*78 = 67626