根号3 × 3次根号9 ÷ 6次根号3
=3^（1/2）* 9^(1/3) ÷3^(1/6)
= 3^（1/2）* (3^2)^(1/3) * 3^(-1/6)
= 3^（1/2）* 3^(2/3) * 3^(-1/6)
=3^（1/2+2/3-1/6）
=3^1
=3