Guangming Primary School has purchased "Ping An Insurance" for 200 students, with an insurance amount of 4,000 yuan per person and a one-year insurance period. Calculated according to the annual insurance premium rate of 0.4%, how much is the insurance premium payable by the school?
光明小学为200名学生投保"平安保险"，保险金额每人4000元，保险期限一年．按年保险费率0.4%计算，学校应付保险费多少元？
<gadget id="calculator">0.4 / 100</gadget>
<output>0.004</output>

<gadget id="calculator">4_000 * 0.004 * 200</gadget>
<output>3_200</output>

<result>3_200</result>