Wang Hong reads a story book. She reads 1/3 of the whole book in the first week, and 25% of the whole book in the second week. At this time, she has read 30 pages more than the rest. How many pages does this storybook have?
王红看一本故事书，第一周看了全书的(1/3)，第二周看了全书的25%，这时已看的比剩下的多30页．这本故事书一共有多少页？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/3) + (1/4)</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">1 - (7/12)</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">(7/12) - (5/12)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">30 / (1/6)</gadget>
<output>180</output>

<result>180</result>