kind of newspaper has one issue per month, and the subscription fee for each issue is 0.5 yuan. Some people in a class subscribe for a whole year, and others subscribe for half a year. The total subscription fee for the whole class is 234 yuan; The whole class subscription fee is 198 yuan. How many people are there in this class?
一种报纸每月一期，每期订费0.5元，一个班一部分人订全年，另一部分人订半年，全班订报费一共是234元；如果订全年的人改订半年，订半年的人改订全年，全班订报费一共是198元，这个班有多少人．
<gadget id="calculator">234 + 198</gadget>
<output>432</output>

<gadget id="calculator">432 / 1.5</gadget>
<output>288</output>

<gadget id="calculator">0.5 * 12</gadget>
<output>6</output>

<gadget id="calculator">288 / 6</gadget>
<output>48</output>

<result>48</result>