Xiao Ming reads a storybook. He reads the whole book (4/15) on the first day and the whole book (2/5) on the second day. He reads a total of 60 pages twice. How many pages does this storybook have?
小明读一本故事书，第一天读了全书的(4/15)，第二天读了全书的(2/5)，两次共读了60页，这本故事书有多少页？
<gadget id="calculator">4 / 15</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(4/15) + (2/5)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">60 / (2/3)</gadget>
<output>90</output>

<result>90</result>