A rope is 4 meters long, what is its (4/7) in meters, and (4/7) meters account for ((())/(())) of the rope.
一条绳子长4米，它的(4/7)是多少米，(4/7)米占这条绳子的((())/(()))．
<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">(4/7) / 4</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">1 / (1/7)</gadget>
<output>7</output>

<gadget id="calculator">16 / 7</gadget>
<output>16/7 = around 2.285714</output>

<result>16/7 = around 2.285714</result>