The mass of a sheep is 58 kg, and the mass of a cow is 20 kg more than 9 times the mass of the sheep. What is the mass of the cow in kg?
一只绵羊的质量是58千克，一头牛的质量是这只绵羊质量的9倍多20千克，这头牛的质量是多少千克？
<gadget id="calculator">58 * 9</gadget>
<output>522</output>

<gadget id="calculator">522 + 20</gadget>
<output>542</output>

<result>542</result>