Gears are mechanical elements with teeth on their rims that can continuously mesh to transmit motion and power. They are interlocking toothed mechanical parts. The diameter of a large gear is twice that of a small gear. If the large gear is stationary, how many revolutions does the small gear make as it completes one revolution around the large gear? Conversely, if the small gear is stationary, how many revolutions does the large gear make as it completes one revolution around the small gear? When the large gear is stationary and the small gear revolves around it once, the small gear rotates once. When the small gear is stationary and the large gear revolves around it once, the large gear rotates one and a half times, which is one revolution at 240°, one and a half revolutions at 360°, two revolutions at 480°, and three revolutions at 720°.