Guanghua Experimental Primary School has 54 female teachers, 9 more than three times the number of male teachers. How many male teachers are there in this school? (Solution of column equation)
光华实验小学有女教师54人，比男教师的3倍还多9人．这个学校有男教师多少人？(列方程解)
<gadget id="calculator">54 - 9</gadget>
<output>45</output>

<gadget id="calculator">45 / 3</gadget>
<output>15</output>

<result>15</result>