The livestock farm raises 240 goats, and the number of dairy goats is three times that of goats. How many more dairy sheep than goats?
畜牧场养山羊240只，养奶羊的只数是山羊的3倍．奶羊的只数比山羊多多少只？
<gadget id="calculator">240 * 3</gadget>
<output>720</output>

<gadget id="calculator">720 - 240</gadget>
<output>480</output>

<result>480</result>