Liu Jia read a book in 5 days (2/7), and Ren Gang read this book in 7 days (3/5). Ask them who reads faster? If the book has 280 pages, how many pages has Ren just read?
刘佳5天看了一本书的(2/7)，任刚7天看了这本书的(3/5)，问他俩谁看书的速度快一些？如果这本书有280页，目前任刚看了多少页？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">280 * (3/5)</gadget>
<output>168</output>

<result>168</result>