Xiao Ming read 150 pages of an extra-curricular book, and left (3/8) unread. How many pages does this extra-curricular book have?
一本课外书小明读了150页，还剩下(3/8)没有读，这本课外书一共有多少页？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 - (3/8)</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">150 / (5/8)</gadget>
<output>240</output>

<result>240</result>