The master and the apprentice work together to process a batch of parts, the apprentice processed 28 pieces, and the number processed by the master is three times that of the apprentice. How many pieces did the master and apprentice process in total?
师徒两人共同加工一批零件，徒弟加工了28个，师傅加工的个数是徒弟的3倍．师徒两人一共加工了多少个？
<gadget id="calculator">28 * 3</gadget>
<output>84</output>

<gadget id="calculator">28 + 84</gadget>
<output>112</output>

<result>112</result>