There are several chickens and rabbits, the total number of their legs is 8 more than three times the total number of heads, and the number of rabbit legs is 72 more than the chicken legs. Ask: How many chickens and rabbits are there?
有鸡和兔子若干只，它们的总腿数比总头数的3倍多8，兔腿比鸡腿多72条，问：鸡和兔子共有多少只？
<gadget id="calculator">72 / 4</gadget>
<output>18</output>

<gadget id="calculator">18 * 3</gadget>
<output>54</output>

<gadget id="calculator">72 - 54 - 8</gadget>
<output>10</output>

<gadget id="calculator">2 / 4</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) * 3</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">(3/2) - 2 - 2</gadget>
<output>-5/2 = around -2.5</output>

<gadget id="calculator">3 + (-5/2)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">10 / (1/2)</gadget>
<output>20</output>

<gadget id="calculator">2 * 20</gadget>
<output>40</output>

<gadget id="calculator">40 + 72</gadget>
<output>112</output>

<gadget id="calculator">112 / 4</gadget>
<output>28</output>

<gadget id="calculator">20 + 28</gadget>
<output>48</output>

<result>48</result>