A beam of electromagnetic radiation of intensity 6.4 x 10⁻⁵W/cm²is comprised of wavelength, λ = 310nm. It falls normally on a metal (work function P = 2eV)of surface area of 1 cm². If one in 10³ photons ejects an electron, total number of electrons ejected in 1s is 10ˣ .

(hc = 1240 eVnm, 1eV = 1.6 x 10⁻¹⁹J),then x is ______.