Master Li processes 57 parts per hour, and Master Wang processes 48 parts per hour. The two work together for 12 hours. How many parts can there be in total?
李师傅每小时加工零件57个，王师傅每小时加工零件48个，两人一起加工12小时，一共可以零件多少个？
<gadget id="calculator">57 + 48</gadget>
<output>105</output>

<gadget id="calculator">105 * 12</gadget>
<output>1_260</output>

<result>1_260</result>