OK, let's crack this. We're given 189 and our task is to multiply it by 7. Essentially, we'll be adding 189 to itself 7 times.
Step 1: 0 + 189 = 189
Step 2: 189 + 189 = 378
Step 3: 378 + 189 = 567
Step 4: 567 + 189 = 756
Step 5: 756 + 189 = 945
Step 6: 945 + 189 = 1134
Step 7: 1134 + 189 = 1323

So, 189*7 = 1323