The third and fourth grades of a certain elementary school had to water 62 trees, and the third grade watered 4 trees each time, 8 times; the rest was watered by the fourth grade, how many trees were watered by the fourth grade?
某小学三年级和四年级要给62棵树浇水，三年级每次浇4棵，浇了8次；剩下的由四年级来浇，四年级浇多少棵？
<gadget id="calculator">4 * 8</gadget>
<output>32</output>

<gadget id="calculator">62 - 32</gadget>
<output>30</output>

<result>30</result>