Dongdong reads a story book. He reads 45 pages on the first day, and reads the whole book (3/8) on the second day. It is known that he reads 20% more pages on the second day than on the first day. How many pages does this story book have? ?
东东看一本故事书，第一天看了45页，第二天看了全书的(3/8)，已知第二天比第一天多看20%，这本故事书共有多少页？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<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">(3/8) / (6/5)</gadget>
<output>5/16 = around 0.3125</output>

<gadget id="calculator">45 / (5/16)</gadget>
<output>144</output>

<result>144</result>