The school gymnasium bought 50 footballs, and the ratio of basketballs to footballs was 3:5. How many basketballs did the school buy?
学校体育馆买进足球50个，买进的篮球与足球比是3：5，学校买进多少篮球？
<gadget id="calculator">50 * 3</gadget>
<output>150</output>

<gadget id="calculator">150 / 5</gadget>
<output>30</output>

<result>30</result>