The teachers and students of Yuhong Elementary School donated money for the hope process. The students donated a total of 864.45 yuan, which was 186.9 yuan less than the teacher. How much did the teachers and students donate in total?
育红小学师生为希望过程捐款，同学们共捐864.45元，比老师少捐款186.9元，师生共捐款多少元？
<gadget id="calculator">864.45 + 186.9 + 864.45</gadget>
<output>1_915.8</output>

<result>1_915.8</result>