There are 52 people in the third grade, with a total of 104 good deeds. The number of good deeds done by the fourth grade is 28 times less than that of the third grade. How many good deeds are there in the third and fourth grades?
三年级有52人，共做好事104件，四年级做的好事比三年级做好事的2倍少28件，三、四年级共做好事多少件？
<gadget id="calculator">104 * 2</gadget>
<output>208</output>

<gadget id="calculator">208 - 28</gadget>
<output>180</output>

<gadget id="calculator">180 + 104</gadget>
<output>284</output>

<result>284</result>