Welcome to Stephen Hawking's Cosmic Calculator. Because even the great minds of the universe need help solving their math problems.
Warning: this calculator uses the simplest of simple math to calculate the most complex of things. Don't worry, it's not like you're actually solving for black holes or anything.
Need help with something else? Try John Lennon's Cosmic Poetry Generator Or if you're feeling particularly Newtonian, try the Isaac Newton's Gravity Generator