With this information, you can calculate the quantity of leagues 840 miles is equal to.

¿What is the inverse calculation between 1 league and 840 miles?

Performing the inverse calculation of the relationship between units, we obtain that 1 league is 0.0035714286 times 840 miles.

Which is the same to say that 840 miles is 280 leagues.

Eight hundred forty miles equals to two hundred eighty leagues. *Approximation

A league is zero times eight hundred forty miles. *Approximation