Dongdong reads a story book, and has already read 48 pages, and there are 16 pages left. How much of the book has he read?
冬冬看一本故事书，已经看了48页，还剩16页，他看了这本书的几分之几？
<gadget id="calculator">48 + 16</gadget>
<output>64</output>

<gadget id="calculator">48 / 64</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>