In a building, the price per square meter of the third floor is 115% of the average price, and the price per square meter of the sixth floor is 85% of the average price. If the price per square meter of the sixth floor is 1,800 yuan less than that of the third floor, What is the average price of this building? Uncle Qian spent 510,000 yuan to buy a 100-square-meter building. Do you know which floor it is on?
一幢楼房，三楼每平方米的售价是平均价格的115%，六楼每平方米的售价是平均价格的85%，如果六楼每平方米的售价比三搂少1800元，这幢楼房的平均价格是多少？钱叔叔花去51万买了一套100平方米的楼房，你知道在哪一层？
<gadget id="calculator">1_800 / 0.3</gadget>
<output>6_000</output>

<result>6_000</result>