3 g of pure aniline is treated with bromine water at room temperature to give a white precipitate of the product ^′ P^′. The mass of product ^′ P^′…

$\displaystyle 3$ g of pure aniline is treated with bromine water at room temperature to give a white precipitate of the product $\displaystyle { }^{\prime} \mathrm{P}^{\prime}$. The mass of product $\displaystyle { }^{\prime} \mathrm{P}^{\prime}$ obtaind is $\displaystyle 26.4$ g . The percentage yield is $\displaystyle \_\_\_\_ \%$.