Yantai, Shandong is a famous "hometown of apples" in the whole country, and its excellent variety "Guoguang" has reached 820 kilograms per mu this year. If the price per kilogram of "Guoguang" apples is 7.5 yuan, and the planting area of Xinxing Orchard has increased by 6.5 mu compared with last year, how much more income will this orchard have than last year?
山东烟台是全国著名的"苹果之乡"，其优良品种"国光"今年亩产达到820千克．如果每千克"国光"苹果的价格是7.5元，新星果园的种植面积比去年扩大了6.5亩，这个果园比去年多收入多少元？
<gadget id="calculator">820 * 6.5 * 7.5</gadget>
<output>39_975</output>

<result>39_975</result>