OK, let's crack this. We're given 300 and our task is to multiply it by 4. Essentially, we'll be adding 300 to itself 4 times.
Step 1: 0 + 300 = 300
Step 2: 300 + 300 = 600
Step 3: 600 + 300 = 900
Step 4: 900 + 300 = 1200

So, 300*4 = 1200