There are 28 boys in the chorus, and the number of girls is twice that of boys. How many people are there in the chorus?
合唱队有28名男生，女生人数是男生的2倍．合唱队一共有多少人？
<gadget id="calculator">28 * 2</gadget>
<output>56</output>

<gadget id="calculator">56 + 28</gadget>
<output>84</output>

<result>84</result>