次の計算をし，ア～カに当てはまる数を半角英数字で入力しなさい。

1. \(\displaystyle \sqrt{6} \div \sqrt{8} \times \sqrt{3} =\frac{\fbox{ア}}{\fbox{イ}} \)
2. \(\displaystyle \sqrt{0.3} \div \sqrt{15} \times \sqrt{\frac{1}{2}} =\frac{\fbox{ウ}}{\fbox{エ}} \)
3. \(\displaystyle \sqrt{1.8} \div \sqrt{\frac{2}{3}} \times \sqrt{0.3} =\frac{\fbox{オ}}{\fbox{カ}} \)