Sure thing, let's get straight to it. We start with 894 and we're going to multiply it by 80, which means adding 894 to itself 80 times.
Step 1: 0 + 894 = 894
Step 2: 894 + 894 = 1788
Step 3: 1788 + 894 = 2682
Step 4: 2682 + 894 = 3576
Step 5: 3576 + 894 = 4470
Step 6: 4470 + 894 = 5364
Step 7: 5364 + 894 = 6258
Step 8: 6258 + 894 = 7152
Step 9: 7152 + 894 = 8046
Step 10: 8046 + 894 = 8940
Step 11: 8940 + 894 = 9834
Step 12: 9834 + 894 = 10728
Step 13: 10728 + 894 = 11622
Step 14: 11622 + 894 = 12516
Step 15: 12516 + 894 = 13410
Step 16: 13410 + 894 = 14304
Step 17: 14304 + 894 = 15198
Step 18: 15198 + 894 = 16092
Step 19: 16092 + 894 = 16986
Step 20: 16986 + 894 = 17880
Step 21: 17880 + 894 = 18774
Step 22: 18774 + 894 = 19668
Step 23: 19668 + 894 = 20562
Step 24: 20562 + 894 = 21456
Step 25: 21456 + 894 = 22350
Step 26: 22350 + 894 = 23244
Step 27: 23244 + 894 = 24138
Step 28: 24138 + 894 = 25032
Step 29: 25032 + 894 = 25926
Step 30: 25926 + 894 = 26820
Step 31: 26820 + 894 = 27714
Step 32: 27714 + 894 = 28608
Step 33: 28608 + 894 = 29502
Step 34: 29502 + 894 = 30396
Step 35: 30396 + 894 = 31290
Step 36: 31290 + 894 = 32184
Step 37: 32184 + 894 = 33078
Step 38: 33078 + 894 = 33972
Step 39: 33972 + 894 = 34866
Step 40: 34866 + 894 = 35760
Step 41: 35760 + 894 = 36654
Step 42: 36654 + 894 = 37548
Step 43: 37548 + 894 = 38442
Step 44: 38442 + 894 = 39336
Step 45: 39336 + 894 = 40230
Step 46: 40230 + 894 = 41124
Step 47: 41124 + 894 = 42018
Step 48: 42018 + 894 = 42912
Step 49: 42912 + 894 = 43806
Step 50: 43806 + 894 = 44700
Step 51: 44700 + 894 = 45594
Step 52: 45594 + 894 = 46488
Step 53: 46488 + 894 = 47382
Step 54: 47382 + 894 = 48276
Step 55: 48276 + 894 = 49170
Step 56: 49170 + 894 = 50064
Step 57: 50064 + 894 = 50958
Step 58: 50958 + 894 = 51852
Step 59: 51852 + 894 = 52746
Step 60: 52746 + 894 = 53640
Step 61: 53640 + 894 = 54534
Step 62: 54534 + 894 = 55428
Step 63: 55428 + 894 = 56322
Step 64: 56322 + 894 = 57216
Step 65: 57216 + 894 = 58110
Step 66: 58110 + 894 = 59004
Step 67: 59004 + 894 = 59898
Step 68: 59898 + 894 = 60792
Step 69: 60792 + 894 = 61686
Step 70: 61686 + 894 = 62580
Step 71: 62580 + 894 = 63474
Step 72: 63474 + 894 = 64368
Step 73: 64368 + 894 = 65262
Step 74: 65262 + 894 = 66156
Step 75: 66156 + 894 = 67050
Step 76: 67050 + 894 = 67944
Step 77: 67944 + 894 = 68838
Step 78: 68838 + 894 = 69732
Step 79: 69732 + 894 = 70626
Step 80: 70626 + 894 = 71520

So, 894*80 = 71520