Xiao Ming is reading a storybook. He read 75 pages in the first week, and there are still (2/5) of the book left unread. How many pages does this storybook have?
小明正在读一本故事书，第一周读了75页，还剩下这本书的(2/5)没有读，这本故事书一共有多少页？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">75 / (3/5)</gadget>
<output>125</output>

<result>125</result>