The school bought 75 volleyballs, but only four times as many basketballs as the volleyballs. How many basketballs did the school buy?
学校买来75只排球，买来的篮球只数是排球的4倍，学校买来篮球多少只？
<gadget id="calculator">75 * 4</gadget>
<output>300</output>

<result>300</result>