With this information, you can calculate the quantity of millimeters 42 miles is equal to.

¿What is the inverse calculation between 1 millimeter and 42 miles?

Performing the inverse calculation of the relationship between units, we obtain that 1 millimeter is 1.4794552e-08 times 42 miles.

Which is the same to say that 42 miles is 67592448 millimeters.

Forty-two miles equals to sixty-seven million five hundred ninety-two thousand four hundred forty-eight millimeters. *Approximation

A millimeter is one times forty-two miles. *Approximation