A parallel plate capacitor has plate area $100{\text{ m}}^2$  and plate separation of  $10\text{ m}$ . The space between the plates is filled up to a thickness $5\text{ m}$  with a material of dielectric constant of 10. The resultant capacitance of the system is ' $x$ '  pF. The value of  ${\epsilon }_0=8.85\times {10}^{-12}\text{ F}\cdot {\text{m}}^{-1}$. The value of '  $x$ ' to the nearest integer is_______