OK, let's crack this. We're given 894 and our task is to multiply it by 7. Essentially, we'll be adding 894 to itself 7 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

So, 894*7 = 6258