A storybook has 60 pages in total. The ratio of the number of pages that Wang Hua read in the first two days to the number of remaining pages is 1:2. After two days of reading, how many pages are left?
一本故事书共60页，王华前两天看的页数与剩下页数的比是1：2，看了两天后，剩下多少页？
<gadget id="calculator">1 + 2</gadget>
<output>3</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">60 * (2/3)</gadget>
<output>40</output>

<result>40</result>