For a storybook, if Wang Jing reads 25 pages a day, she can finish it in 6 days. If she reads 30 pages a day, how many days can she finish it?
一本故事书，王静如果每天看25页，6天可以看完．她如果每天看30页，几天能看完？
<gadget id="calculator">6 / 30</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">25 * (1/5)</gadget>
<output>5</output>

<result>5</result>