A story book, I have read 30 pages, just read (1/4) of the whole book, how many pages does this story book have?
一本故事书，已经看了30页，正好看了全书的(1/4)，这本故事书有多少页？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">30 / (1/4)</gadget>
<output>120</output>

<result>120</result>