The new rural medical insurance stipulates that the threshold for reimbursement for medical treatment for farmers is 400 yuan, and the excess part will be subsidized by the government at 45%. Uncle Gao was hospitalized for 20 days due to illness, and incurred a total of 9,980 yuan in medical expenses, so how much should he pay at his own expense?
新农村医疗保险规定，农民看病报销的起付线为400元，超出部分按45%由政府给予补贴．高大叔因病住院20天，共产生医药费9980元，那么他自费部分应该是多少元？
<gadget id="calculator">9_980 - 400</gadget>
<output>9_580</output>

<gadget id="calculator">45 / 100</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">9_580 * (9/20)</gadget>
<output>4_311</output>

<gadget id="calculator">9_980 - 4_311</gadget>
<output>5_669</output>

<result>5_669</result>