$4 ÷ 3 = x$
$4 = 3 × x$
$4 × \dfrac{1}{3} = 3 × x × \dfrac{1}{3}$
$4 × \dfrac{1}{3} = x$
因为 $4 ÷ 3 = x$,$4 × \dfrac{1}{3} = x$,所以 $4 ÷ 3 = 4 × \dfrac{1}{3}$。
$\dfrac{6}{7} ÷ \dfrac{3}{14} = x$
$\dfrac{6}{7} = \dfrac{3}{14} × x$
$\dfrac{6}{7} × \dfrac{14}{3} = \dfrac{3}{14} × x × \dfrac{14}{3}$
$\dfrac{6}{7} × \dfrac{14}{3} = x$
因为 $\dfrac{6}{7} ÷ \dfrac{3}{14} = x$,$\dfrac{6}{7} × \dfrac{14}{3} = x$,所以 $\dfrac{6}{7} ÷ \dfrac{3}{14} = \dfrac{6}{7} × \dfrac{14}{3}$。