- Be careful, Sal! You have some very picky customers who really know what they want! Luckily, your the person for the job. You have three minutes to fulfill eight customer orders. Because you cater to a cosmopolitan bunch, some patrons might order their subs in metric units of length, while others might order their subs in standard units of length. Don’t worry Sal, you have precision rulers that can take care of both kinds of orders. The question is…can you use those rulers when a customer orders a sub 5 and 10/16 inches long, or 12 and 2/5 centimeters long? If your precision can satisfy all ten customers, you can print out your “Super Sub Maker” certificate to show off to the world.