With this information, you can calculate the quantity of square kilometers 640 square meters is equal to.
¿What is the inverse calculation between 1 square kilometer and 640 square meters?
Performing the inverse calculation of the relationship between units, we obtain that 1 square kilometer is 1562.5 times 640 square meters.
Which is the same to say that 640 square meters is 0.00064 square kilometers.
Six hundred forty square meters equals to zero square kilometers. *Approximation
A square kilometer is one thousand five hundred sixty-two times six hundred forty square meters. *Approximation