There are 3 classes in the third grade, with 47 students in each class, including 89 female students and how many male students?
三年级有3个班，每班47人，其中女同学有89人，男同学有多少人？
<gadget id="calculator">47 * 3</gadget>
<output>141</output>

<gadget id="calculator">141 - 89</gadget>
<output>52</output>

<result>52</result>