Limin Sports Store purchased a treadmill with a price tag of 4250 yuan. A week later, it was still not sold after a 10% discount, and it was sold after a 20% discount again. How much is the selling price of this treadmill?
利民运动商店购进一台跑步机，标价4250元．一周后打九折仍没有卖出，再次打八折才卖出，这台跑步机卖出的价格是多少元？
<gadget id="calculator">90 / 100</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">4_250 * (9/10) * (4/5)</gadget>
<output>3_060</output>

<result>3_060</result>