In the love donation activity, two classes in the third grade of our school donated 130 yuan each, and two classes in the fourth grade donated 150 yuan each. How much did the students in the third and fourth grades donate in total?
在献爱心捐款活动中，我校三年级两个班，每班捐款130元，四年级两个班每班捐款150元，三、四年级同学一共捐款多少元？
<gadget id="calculator">130 * 2</gadget>
<output>260</output>

<gadget id="calculator">150 * 2</gadget>
<output>300</output>

<gadget id="calculator">260 + 300</gadget>
<output>560</output>

<result>560</result>