It is known that ((a)/(b)) is the simplest fraction, and 1<a<4, 3<b<9, what is the smallest of these fractions?
已知((a)/(b))是最简分数，且1＜a＜4，3＜b＜9，这些分数中最小的一个是多少．
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<result>2/7 = around 0.285714</result>