A plant virus is found to consists of uniform cylindrical particles of $\text{15}0{\text{A}}^0$ in diameter & $\text{5}000{\text{A}}^0$ long. The specific volume of the virus is $0.{\text{75cm}}^{\text{3}}/\text{g}.$ If the virus is considered to be a single particle, its molecular weight is $x\times {10}^7.$ Then $x$ is (Round off to nearest integer)