Guangming Primary School has 1,205 students, 20 more than five times the number of students when the school was founded. How many people were there when the school was founded?
光明小学有学生1205人，比建校时学生数的5倍还多20人．这个学校建校时有多少人？
<gadget id="calculator">1_205 - 20</gadget>
<output>1_185</output>

<gadget id="calculator">1_185 / 5</gadget>
<output>237</output>

<result>237</result>