A pig weighs 75 kilograms, and the weight of 12 pigs is exactly three times that of a cow. How many kilograms does a cow weigh?
一头猪75千克，12头猪的重量刚好是一头牛的3倍，一头牛重多少千克？
<gadget id="calculator">12 / 3</gadget>
<output>4</output>

<gadget id="calculator">75 * 4</gadget>
<output>300</output>

<result>300</result>