Xiaodong reads a story book. He reads (1/3) of the whole book on the first day and the rest (2/5) on the second day. There are still 60 pages left to read. How many pages does this storybook have?
小东读一本故事书，第一天读了全书的(1/3)，第二天读了余下的(2/5)，这时还剩下60页没读．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">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">60 / (3/5) / (2/3)</gadget>
<output>150</output>

<result>150</result>