In this semester, the third grade collected 55 kilograms of waste paper, and the fourth grade collected twice as much waste paper as the third grade. How many kilograms of waste paper did the third and fourth grade collect together?
在本学期里，三年级收集了55千克废纸，四年级收集的废纸是三年级的2倍，三年和四年级一共收集了多少千克废纸？
<gadget id="calculator">55 * 2</gadget>
<output>110</output>

<gadget id="calculator">110 + 55</gadget>
<output>165</output>

<result>165</result>