Вычисли

1. \(\sqrt{16\cdot 81}=\) [ ].
2. \(\sqrt{(-36)\cdot (-49)}=\) [ ].
3. \(\sqrt{16\cdot 49\cdot 225}=\) [ ].
4. \(\sqrt{0,36\cdot 64\cdot 25}=\) [ ].
5. \(\sqrt{6}\cdot \sqrt{24}=\) [ ].
6. \(\sqrt{7}\cdot \sqrt{28}=\) [ ].
7. \(\sqrt{7}\cdot \sqrt{7^3}=\) [ ].
8. \(\sqrt{3^3}\cdot \sqrt{3^5}=\) [ ].
9. \(\sqrt{3}\cdot \sqrt{18}\cdot \sqrt{24}=\) [ ].
10. \(\sqrt{21}\cdot \sqrt{\dfrac{2}{7}}\cdot \sqrt{\dfrac{8}{3}}=\) [ ].