In an exoplanetary system, the planet Kepler-186f has an estimated diameter of 15 000 km15\,000\text{ km}15000 km.
The host star, Kepler-186, has a diameter that is 48 times greater than the diameter of Kepler-186f. Calculate the diameter of the star Kepler-186.
An inner rocky planet in the same system has a diameter that is 0.36 times the diameter of Kepler-186f. Calculate the diameter of this inner planet.