There are 3 teaching classes in the third grade of the school, and the average number of students in each class is about 39. How many students are there in the third grade of the school?
学校三年级有3个教学班，平均每个班学生人数大约是39人．学校三年级大约有学生多少人？
<gadget id="calculator">39 * 3</gadget>
<output>117</output>

<result>117</result>