Haley’s Comet orbits the Sun with an average orbital radius of 2.67x1012m. The Sun has a mass of 1.99x1030kg. What is the period of revolution, in Earth Years, of Haley’s Comet?

The purpose of a lab is to do your "expirements" the importance of the topic is so you can now what the story is about and the last one is because no one is me with my question ( what is 3 over 4 x - 9 = 27 maybe you can )