A story book, Xiao Ming read (1/5) of the whole book on the first day, and read 25 pages. How many pages does this story book have?
一本故事书，小明第一天看了全书的(1/5)，看了25页，这本故事书一共有多少页？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">25 / (1/5)</gadget>
<output>125</output>

<result>125</result>