OK, let's crack this. We're given 918 and our task is to multiply it by 4. Essentially, we'll be adding 918 to itself 4 times.
Step 1: 0 + 918 = 918
Step 2: 918 + 918 = 1836
Step 3: 1836 + 918 = 2754
Step 4: 2754 + 918 = 3672

So, 918*4 = 3672