The document describes a story about seven dinosaurs of different sizes that live in a jungle called "Length". Each dinosaur's name corresponds to a unit of measurement, from millisaur to hectosaur to kilosaur. Kilosaur believes it is the king of the jungle due to its large size. However, the other dinosaurs challenge Kilosaur to a race, with the condition that they can get help from their friends. During the race, the smaller dinosaurs' friends - who represent zeros - help them go faster by acting as rollers for skateboards. With the help of their zero friends, all the dinosaurs reach the finish line at the same time. This teaches Kilosaur about the value of zeros in converting between