OK, let's work through this together. We're starting with 894 and we're going to multiply it by 13, which means we add 894 to itself 13 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

So, 894*13 = 11622