Uncle Li bought a computer. If you want to pay in installments, you need to pay 3,500 yuan down, and then pay 265 yuan per month for a total of 12 months. If you make a one-time payment, you only need to pay 6,000 yuan. How much more will Uncle Li pay for this computer in installments than in one lump sum?
李叔叔购买一台电脑．如果要分期付款，需要首付3500元，以后每月付265元，共付12个月．如果一次性付款，只需付6000元．李叔叔购买这台电脑分期付款要比一次陆付款多花多少元？
<gadget id="calculator">265 * 12</gadget>
<output>3_180</output>

<gadget id="calculator">3_180 - 6_000</gadget>
<output>-2_820</output>

<gadget id="calculator">3_500 + (-2_820)</gadget>
<output>680</output>

<result>680</result>