A man who weighs $900$ N is standing upright. The cross$-$section area of his femur is $8\mathrm{.}0$ cm². What is the strain on his right femur while he is standing? Assume half of his weight is distributed on each femur. The elastic modulus of the femur bone is $9\mathrm{.}4$ x $10\mathrm{⁹}$ N$/$m$\mathrm{²}.$