The fruit shop has bought 1000 kg of a certain fruit, the purchase price is 7 yuan/kg, and the selling price is 11 yuan/kg. After half of the sales, in order to sell them out as soon as possible, they are going to sell them at a discount. If they want to make this batch of fruits earn 3450 yuan Yuan, how much discount should the remaining fruit be sold at the original price?
水果店进了某种水果1000千克，进价为7元/千克，售价为11元/千克，售出一半后，为了尽快售完，准备打折出售，如果要使这批水果能赚到3450元，那么余下的水果应按原售价打几折出售？
<gadget id="calculator">1_000 / 2</gadget>
<output>500</output>

<gadget id="calculator">500 * 7</gadget>
<output>3_500</output>

<gadget id="calculator">500 * 11</gadget>
<output>5_500</output>

<gadget id="calculator">3_450 - 5_500</gadget>
<output>-2_050</output>

<gadget id="calculator">3_500 + 3_500 + (-2_050)</gadget>
<output>4_950</output>

<gadget id="calculator">500 * 11 * 0.1</gadget>
<output>550</output>

<gadget id="calculator">4_950 / 550</gadget>
<output>9</output>

<result>9</result>