A and B process parts. A processes 65 pieces per hour, B processes 75 pieces per hour, and the two work for 12 hours. How many parts are processed in total?
甲乙两人加工零件．甲每时加工65个，乙每小时加工75个，两人加工12个小时，一共加工了多少个零件？
<gadget id="calculator">65 + 75</gadget>
<output>140</output>

<gadget id="calculator">140 * 12</gadget>
<output>1_680</output>

<result>1_680</result>