Planet's Temperature

This app takes in information about a planet and says the average surface temperature of this planet, with no green house effect. There are two possible ways to do this:
The user can inform the radius of the planet's star as well as the surface temperature of this star together with the albedo of the planet and the distance from the planet to the star or the output of the star and also the albedo of the planet and and the distance from the planet to the star.
Units are all informed in the app.
After this the user hits button and the average surface of the planet is shown, both in scientific notation and normal writing.