COMPARISON OF ADJECTIVES

AS + ADJECTIVE + AS
To compare people, places, events or things, when there is no difference, use as + adjective + as:
Peter is 24 years old. John is 24 years old. Peter is as old as John.
More examples:
Moscow is as cold as St. Petersburg in the winter.
Ramona is as happy as Raphael.
Einstein is as famous as Darwin.
A tiger is as dangerous as a lion.