Grandma Wang participated in the rural cooperative medical insurance. In March this year, Grandma Wang was hospitalized for one month due to illness, and the medical expenses totaled 9,500 yuan. According to the provisions of medical insurance, the individual pays less than 400 yuan, and the state compensates 45% of the part exceeding 400 yuan. According to this clause, how much does Grandma Wang have to pay?
王奶奶参加了农村合作医疗保险．今年3月王奶奶因病住院治疗一个月，医疗费用共计9500元．按医疗保险条款规定，400元以内的个人自付，超过400元的部分，国家按45%补偿．按此条款，王奶奶要自付多少元？
<gadget id="calculator">9_500 - 400</gadget>
<output>9_100</output>

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

<gadget id="calculator">1 - (9/20)</gadget>
<output>11/20 = around 0.55</output>

<gadget id="calculator">9_100 * (11/20)</gadget>
<output>5_005</output>

<gadget id="calculator">5_005 + 400</gadget>
<output>5_405</output>

<result>5_405</result>