A whole is divided into 9 parts on average, and how many such 7 parts are represented by fractions.
一个整体平均分成9份，这样的7份用分数表示是多少．
<gadget id="calculator">7 / 9</gadget>
<output>7/9 = around 0.777778</output>

<result>7/9 = around 0.777778</result>