Li Feng reads a storybook. He read 45% of the whole book in the first week, and 2/5 of the whole book in the second week. There are still 60 pages left. How many pages does this storybook have?
李峰看一本故事书，第一周看了全书的45%，第二周看了全书的(2/5)，还有60页没有看，这本故事书一共有多少页？
<gadget id="calculator">45 / 100</gadget>
<output>9/20 = around 0.45</output>

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

<gadget id="calculator">(9/20) + (2/5)</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">1 - (17/20)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">60 / (3/20)</gadget>
<output>400</output>

<result>400</result>