After the "Wenchuan" earthquake, 186,000 people in Shiquan County used different methods to support the disaster area to rebuild their homes. A school donated 146.8 yuan to the first class of the fourth grade, and 161.3 yuan to the second class of the fourth grade. Please ask a mathematical problem based on the above information and answer it.
"汶川"地震发生后，石泉县18.6万人纷纷用不同的方式支援灾区重建家园．某学校四年级一班捐款146.8元，四年级二班捐款161.3元．请根据以上信息提一个数学问题并解答．
<gadget id="calculator">146.8 + 161.3</gadget>
<output>308.1</output>

<result>308.1</result>