Two candles of different thickness and length, the short one can burn for 6 hours, and the long one can burn for 4 hours. Ignite them at the same time. After 2 hours, the length of the remaining part is exactly the same. So what fraction of the length of the long candle is the length of the short candle?
两支粗细、长度都不一样的蜡烛，短的一支可以燃6小时，长的一支可以燃4小时．将它们同时点燃，2小时后，所余部分的长度正好相同，那么长蜡烛长度是短蜡烛长度的几分之几？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(2/3) / (1/2)</gadget>
<output>4/3 = around 1.333333</output>

<result>4/3 = around 1.333333</result>