storybook, Xiaoqing read (3/7) of this storybook on the first day, and read as much on the second day as on the first day. What percentage of the storybook did she read in total in the two days?
一本故事书，小青第一天看了这本故事书的(3/7)，第二天看的与第一天同样多，两天一共看了这本故事书的几分之几？
<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">(3/7) + (3/7)</gadget>
<output>6/7 = around 0.857143</output>

<result>6/7 = around 0.857143</result>