Two sheep weigh 50 kg, and a cow weighs 7 times that of the two sheep. How much does a cow weigh more than the two sheep?
两只羊重50千克，一头牛的重量是两只羊的7倍，一头牛比两只羊重多少千克？
<gadget id="calculator">7 - 1</gadget>
<output>6</output>

<gadget id="calculator">50 * 6</gadget>
<output>300</output>

<result>300</result>