Naughty is reading 280 pages of an extra-curricular book these days. I read this book on the first day (3/7), and the number of pages I read on the second day is the first day (2/3); How many pages did you read in total?
淘气这几天在看一本课外书280页，第一天看了这本书的(3/7)，第二天看的页数是第一天的(2/3)；这两天淘气一共看了多少页？
<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">280 * (3/7)</gadget>
<output>120</output>

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

<gadget id="calculator">280 * (3/7) * (2/3)</gadget>
<output>80</output>

<gadget id="calculator">120 + 80</gadget>
<output>200</output>

<result>200</result>