In order to help the children in the disaster-stricken area of Zhouqu, Gansu go back to school, Experimental Primary School carried out a donation activity. The third grade donated 918 yuan, which was three times the amount donated by the second grade. How much did the second and third grades donate in total?
为了帮助甘肃舟曲灾区的孩子重返校园，实验小学进行捐款活动，三年级捐款918元，是二年级捐款钱数的3倍，二、三年级共捐款多少元？
<gadget id="calculator">918 / 3</gadget>
<output>306</output>

<gadget id="calculator">918 + 306</gadget>
<output>1_224</output>

<result>1_224</result>