The fourth grade donated 431.5 yuan, and the sixth grade was 34.6 yuan more than the fourth grade. How much did the fourth and sixth grades donate in total?
四年级捐款431.5元，六年级比四年级多34.6元．四年级和六年级共捐款多少元？
<gadget id="calculator">431.5 + 34.6 + 431.5</gadget>
<output>897.6</output>

<result>897.6</result>