Strongly read a story book, read this book in 8 days (4/7), how many days will it take to finish reading the rest?
强强看一本故事书，8天看了这本书的(4/7)，余下的还要多少天看完？
<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">8 / (4/7)</gadget>
<output>14</output>

<gadget id="calculator">14 - 8</gadget>
<output>6</output>

<result>6</result>