What is the simplest fraction with the smallest denominator inserted between (2/3) and (3/4).
在(2/3)和(3/4)之间插入分母最小的最简分数是多少．
<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<result>5/7 = around 0.714286</result>