Xiao Ming reads a story book. He reads 50 pages on the first day, and reads 1/3 of the whole book on the second day. He reads 20% more pages on the second day than on the first day. How many pages does this book have?
小明看一本故事书，第一天看了50页，第二天看了全书的(1/3)，第二天看的比第一天多20%，这本书有多少页？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(6/5) / (1/3)</gadget>
<output>18/5 = around 3.6</output>

<gadget id="calculator">50 * (18/5)</gadget>
<output>180</output>

<result>180</result>