Master and apprentice work together to process parts for 8 hours. The master processes 56 pieces per hour, and the apprentice processes 28 pieces per hour. How many pieces are processed by the master and the apprentice?
师父和徒弟共同加工零件8小时．师父每小时加工56个，徒弟每小时加工28个，师徒两人一共加工多少个？
<gadget id="calculator">56 + 28</gadget>
<output>84</output>

<gadget id="calculator">84 * 8</gadget>
<output>672</output>

<result>672</result>