After reading 60% of a book, there are 480 pages left. How many pages are there?
一本书看了60%，还剩480页．共多少页？
<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">480 / (2/5)</gadget>
<output>1_200</output>

<result>1_200</result>