Pigs, cows, and sheep weigh 800 kilograms in total. The average weight of pigs and cows is 370 kilograms. What is the weight of sheep in kilograms?
猪、牛、羊共重800千克，猪和牛平均体重是370千克，羊的体重是多少千克．
<gadget id="calculator">370 * 2</gadget>
<output>740</output>

<gadget id="calculator">800 - 740</gadget>
<output>60</output>

<result>60</result>