The weight of an elephant is 140 kilograms more than 9 times that of a cow. It is known that the weight of an elephant is 5 tons. Find the weight of a cow in kilograms. (Solution problems of column equations)
大象的体重比牛的9倍还多140千克，已知大象的体重是5吨，求牛的体重是多少千克．(列方程解应用题)
<gadget id="calculator">5_000 - 140</gadget>
<output>4_860</output>

<gadget id="calculator">4_860 / 9</gadget>
<output>540</output>

<result>540</result>