In Spanish, "3524 miles long" is said as "3524 millas de largo."
miles
Cuántos tiempo...
De dos a diez millas.
Pelo largo.
camisa larga
"brazos largos"
viva la
día largo
Largo(a)(s)
vete largo
You say "larga vida enanos"
siete miles cuatrocientos veintiuno or in numbers, it would be the same