A chemistry student needs $35\mathrm{.}0g$ of $1-$bromobutane for an experiment. He has available $0\mathrm{.}50kg$ of a $27\mathrm{.}7\%\frac{w}{w}$ solution of $1-$bromobutane in ethanol. Calculate the mass of solution the student should use.

Round your answer to $3$ significant digits.