Wang Qiang reads a science and technology book, and has already read (5/8) of the whole book, and there are 90 pages left. How many pages does this technical book have?
王强看一本科技书，已经看了全书的(5/8)，还剩90页．这本科技书共有多少页？
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">1 - (5/8)</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">90 / (3/8)</gadget>
<output>240</output>

<result>240</result>