Xiao Ming reads a storybook. He reads 30% of the whole book on the first day and 40% of the whole book on the second day. He reads a total of 70 pages in two days. How many pages does this storybook have?
小明看一本故事书，第一天看了全书的30%，第二天看了全书的40%，两天一共看了70页，这本故事书有多少页？
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(3/10) + (2/5)</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">70 / (7/10)</gadget>
<output>100</output>

<result>100</result>