There are 18 volleyballs in the school sports room, and 15 more footballs than volleyballs. How many volleyballs and footballs are there in the school sports room?
学校体育室有排球18个，足球的个数比排球多15个，学校体育室有排球、足球共多少个？
<gadget id="calculator">18 + 15 + 18</gadget>
<output>51</output>

<result>51</result>