According to regulations: Residents participating in urban medical insurance can be reimbursed at 72% of medical expenses for hospitalization. Uncle Wang was hospitalized due to illness, and when he was finally discharged from the hospital, he actually paid 1,400 yuan for medical expenses with his medical insurance card. How much will he pay if he does not participate in the urban medical insurance?
按规定：参加城镇医保的居民住院看病可按医药费的72%报销．王大爷因病住院，最后出院时凭医保卡他实际支付医药费1400元．如果他不参加城镇医保，将多付多少钱？
<gadget id="calculator">72 / 100</gadget>
<output>18/25 = around 0.72</output>

<gadget id="calculator">1 - (18/25)</gadget>
<output>7/25 = around 0.28</output>

<gadget id="calculator">1_400 / (7/25)</gadget>
<output>5_000</output>

<gadget id="calculator">5_000 - 1_400</gadget>
<output>3_600</output>

<result>3_600</result>