OK, let's crack this. We're given 526 and our task is to multiply it by 4. Essentially, we'll be adding 526 to itself 4 times.
Step 1: 0 + 526 = 526
Step 2: 526 + 526 = 1052
Step 3: 1052 + 526 = 1578
Step 4: 1578 + 526 = 2104

So, 526*4 = 2104