Xiaohua reads a book, and has already read (5/8) of the whole book, which happens to be 80 pages. How many pages does this book have?
小华看一本书，已经看了全书的(5/8)，正好是80页．这本书共有多少页？
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">80 / (5/8)</gadget>
<output>128</output>

<result>128</result>