A hole is drilled in a metal sheet. At 27^oC the diameter of hole is 5 cm. When the sheet is heated to 177^oC , the change in the diameter of hole is $\mathrm{d} \times {10}^{-3} \mathrm{cm}$. The value of d will be _________ if coefficient of linear expansion of the metal is $1.6 \times {10}^{-5} /°\mathrm{C}$