Naughty can read a book (3/7) every day, the same book, it takes 4 days to read the same book, Xiaoxiao can read this book every day ((())/(())), how many to read first Complete book.
淘气每天可看一本书的(3/7)，同样的书，笑笑看完要4天，笑笑每天可看这本书的((())/(()))，多少先看完整本书．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>