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