The average distance between the earth and the moon is 3.8×10⁵km. 5 times this distance is 19×10⁵km. In standard form this is 1,900,000 km. One million nine hundred thousand kilometres or 1.9×10⁶km.
If the distance between Earth and Moon is 7 units (as in a model or drawing) each unit represents 3.8/7×10⁵km=5.43×10⁴km approx.