What equal 42?

Answer 1

As a product of its prime factors: 2*3*7 = 42

Answer 2

All of the mathematicians who ever lived, including teachers and Nobel Prize winners,
using the entire infinite variety of all positive, negative, rational, irrational, imaginary,
complex, and transcendental numbers, have until now found only a single quantity
that is equal to 42. Interestingly, it is the number: 42

Answer 3

30