There are 25 basketballs in the sports equipment room, and the number of volleyballs is twice that of basketballs. How many basketballs and volleyballs are there?
体育器材室里有篮球25个，排球的个数是篮球的2倍．篮球和排球共有多少个？
<gadget id="calculator">25 * 2</gadget>
<output>50</output>

<gadget id="calculator">50 + 25</gadget>
<output>75</output>

<result>75</result>