Ответ:

  1. \(\sqrt{6\cdot40}\cdot\sqrt{60}=\sqrt{240\cdot60}=\sqrt{14400}=120\).
  2. \(2\sqrt{22}\cdot2\sqrt{3}\cdot\sqrt{66}=4\sqrt{22\cdot3\cdot66}=4\sqrt{4356}=264\).