OK, let's crack this. We're given 149 and our task is to multiply it by 4. Essentially, we'll be adding 149 to itself 4 times.
Step 1: 0 + 149 = 149
Step 2: 149 + 149 = 298
Step 3: 298 + 149 = 447
Step 4: 447 + 149 = 596

So, 149*4 = 596