Uncle Wang participates in the rural cooperative medical insurance in our city. The clause stipulates that if hospitalized in a city-level designated hospital, the individual shall be responsible for the amount up to 400 yuan (including 400 yuan), and the part exceeding 400 yuan shall be compensated at 45%. In April this year, Uncle Wang suffered from acute enteritis and was hospitalized in a designated hospital for 20 days. The medical expenses totaled 8,260 yuan. According to the terms and conditions, how much does Uncle Wang only need to pay?
王大伯参加我市农村合作医疗保险．条款规定：在市级定点医院住院，400元内(包括400元)个人自己负责，超过400元部分按45%补偿．今年4月份王大伯患了急性肠炎在定点医院住院治疗了20天，医疗费用共计8260元．按条款规定，王大伯只要自己付多少元？
<gadget id="calculator">8_260 - 400</gadget>
<output>7_860</output>

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

<gadget id="calculator">7_860 * (9/20)</gadget>
<output>3_537</output>

<gadget id="calculator">8_260 - 3_537</gadget>
<output>4_723</output>

<result>4_723</result>