Xiaohong reads a story book. She reads 30 pages on the first day and 45 pages on the second day. She just reads the whole book in two days (3/5). How many pages does this storybook have?
小红看一本故事书，第一天看了30页，第二天看了45页，两天正好看了全书的(3/5)．这本故事书共有多少页？
<gadget id="calculator">30 + 45</gadget>
<output>75</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">75 / (3/5)</gadget>
<output>125</output>

<result>125</result>