The classmates carried water to water the trees. The third grade waters 45 trees, the third grade waters 10 less trees than the fourth grade, and the fourth grade waters half of the number of fifth grade trees. How many more trees are watered in the fifth grade than in the third grade?
同学抬水浇树．三年级浇45棵，三年级比四年级少浇10棵，四年级是五年级浇的棵数的一半．五年级比三年级多浇多少棵？
<gadget id="calculator">45 + 10</gadget>
<output>55</output>

<gadget id="calculator">55 * 2</gadget>
<output>110</output>

<gadget id="calculator">110 - 45</gadget>
<output>65</output>

<result>65</result>