OK, let's crack this. We're given 948 and our task is to multiply it by 3. Essentially, we'll be adding 948 to itself 3 times.
Step 1: 0 + 948 = 948
Step 2: 948 + 948 = 1896
Step 3: 1896 + 948 = 2844

So, 948*3 = 2844