There are two candles with different lengths and thicknesses. The thick one can be lit for 6 hours, and the thin one can be lit for 4 hours. After two hours of burning, the length of the thick one is twice the length of the thin one. Count how many hours, the length of the thick one is three times the length of the thin one.
有两只长短粗细都不相同的蜡烛，粗的能点6小时，细的能点4小时，点了两个小时以后粗的一只的长度是细的一只蜡烛的长度的2倍，再点多少小时，粗的一只的长度是细的一只的长度的3倍．
<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(3/2) * (2/3)</gadget>
<output>1</output>

<result>1</result>