Xiaohua reads a storybook, the ratio of the number of pages he has read to the number of pages he has not read is 3:5, he has read 45 pages, how many pages are there in this storybook?
小华看一本故事书，已看的页数与未看的页数之比是3：5，他已看了45页，这本故事书有多少页？
<gadget id="calculator">3 + 5</gadget>
<output>8</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">45 / (3/8)</gadget>
<output>120</output>

<result>120</result>