The school organizes student donations. Class Three and Class 1 donated 378 yuan, Class Three and Class 2 donated 46 Yuan more than Class Three and Class 1, and the total donation of the fourth grade was twice that of the two classes of the third grade. How much is the fourth grade donation?
学校组织学生捐款，三1班捐款378元，三2班捐的款比三1班多46元，四年级捐款总数是三年级两个班捐款总数的2倍．四年级捐款多少元？
<gadget id="calculator">378 + 46 + 378</gadget>
<output>802</output>

<gadget id="calculator">802 * 2</gadget>
<output>1_604</output>

<result>1_604</result>