There are 25 more volleyballs than footballs in the sports room. Later, 42 footballs and 15 volleyballs were purchased. Are there more volleyballs or footballs now? How many more?
体育室里的排球比足球多25个，后来又购进了42个足球和15个排球，现在是排球多还是足球多？多多少个？
<gadget id="calculator">42 - 15</gadget>
<output>27</output>

<gadget id="calculator">27 - 25</gadget>
<output>2</output>

<result>2</result>