Li Ning's family has 80 pepper trees, each of which can produce 12 kilograms of peppercorns on average. This year, each kilogram of peppercorns can be sold for 9 yuan. How much is the income?
李宁家有花椒树80棵，平均每棵可以产花椒12千克，今年每千克花椒可以卖9元，可以收入多少元？
<gadget id="calculator">12 * 80</gadget>
<output>960</output>

<gadget id="calculator">9 * 960</gadget>
<output>8_640</output>

<result>8_640</result>