Seems like your question is quite incomplete, I bet here is the missing part *<or = 22.12 for the width w in inches of a desk drawer.
According to the fact that abs(w-22) should be less than equal to 12, the answer should have a look like this : Iw - 22I < or = 0.12. I am pretty sure it will help you.
Next time check it carefully. Regards!