OK, let's crack this. We're given 894 and our task is to multiply it by 28. Essentially, we'll be adding 894 to itself 28 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

So, 894*28 = 25032