There are two long and short candles, (the same length of burning in the same time), the sum of their length is 56 cm, after they are lit at the same time for a period of time, the long candle is as long as the short candle before it is lit, and the length of the short candle is just right It is 2/3 of the long candle. How long is the long candle before it is lit?
有长短两支蜡烛，(相同时间中燃烧长度相同)，它们的长度之和为56厘米，将它们同时点燃一段时间后，长蜡烛同短蜡烛点燃前一样长，这时短蜡烛的长度又恰好是长蜡烛的2/3．点燃前长蜡烛有多长？
<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">3 + 4</gadget>
<output>7</output>

<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">56 * (4/7)</gadget>
<output>32</output>

<result>32</result>