Wang Hua is reading a storybook. He read 80 pages in the first week, and there are still (3/5) of this book left unread. How many pages does this storybook have?
王华正在读一本故事书，第一周读了80页，还剩下这本书的(3/5)没读，这本故事书一共有多少页？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">80 / (2/5)</gadget>
<output>200</output>

<result>200</result>