If a>0, in the three formulas of a/2(1/5), a/(5/6) and a/(6/7), the quotient of a/how much is the largest.
如果以a＞0，在a/2(1/5)，a/(5/6)和a/(6/7)这3个算式中，a/多少的商最大．
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<result>5/6 = around 0.833333</result>