Xiaorui reads a story book, reads all (3/8) on the first day, and reads all (2/7) on the second day, how many of them are read in total in two days.
小瑞看一本故事书，第一天看了全部的(3/8)，第二天又看了全部的(2/7)，两天共看了全部的多少．
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">(3/8) + (2/7)</gadget>
<output>37/56 = around 0.660714</output>

<result>37/56 = around 0.660714</result>