Uncle Wang raised 5 cows. In 2012, each cow produced an average of 15 kilograms of milk per day, 5 kilograms less than twice that of last year. If each kilogram of milk is 3 yuan, what was Uncle Wang’s income last year?
王大爷养了5头奶牛，2012年每头奶牛平均每天产奶15千克，比去年的2倍少5千克，如果每千克奶3元，去年王大爷的收入是多少？
<gadget id="calculator">15 + 5</gadget>
<output>20</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">10 * 5 * 3 * 365</gadget>
<output>54_750</output>

<result>54_750</result>