Xiaohong reads a story book. On the first day, she reads 1/5 of the whole book, and on the second day, she reads 20% of the whole book. In two days, she reads a total of 36 pages. How many pages does this storybook have?
小红看一本故事书，第一天看了全书的(1/5)，第二天看了全书的20%，两天共看了36页．这本故事书有多少页？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) + (1/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">36 / (2/5)</gadget>
<output>90</output>

<result>90</result>