The school holds a sports meeting. There are 4 classes in the third grade. Each class has 12 athletes. The number of spectators is twice the number of athletes. How many students are there in the third grade?
学校举行运动会，三年级共4个班，每个班有12名运动员，观众人数是运动员人数的2倍，三年级共有学生多少人？
<gadget id="calculator">12 * 4</gadget>
<output>48</output>

<gadget id="calculator">12 * 4 * 2</gadget>
<output>96</output>

<gadget id="calculator">48 + 96</gadget>
<output>144</output>

<result>144</result>