Chickens and rabbits share the same cage, with a total of 206 legs. The number of rabbits is 52 less than that of chickens. How many chickens are there?
鸡兔同笼，共206条腿，兔比鸡少52只，鸡有多少只．
<gadget id="calculator">2 * 52</gadget>
<output>104</output>

<gadget id="calculator">206 - 104</gadget>
<output>102</output>

<gadget id="calculator">4 + 2</gadget>
<output>6</output>

<gadget id="calculator">102 / 6</gadget>
<output>17</output>

<gadget id="calculator">17 + 52</gadget>
<output>69</output>

<result>69</result>