A and B can process a total of 54 parts at 2 hours, and A can process 4 more parts at 3 hours than B at 4 hours. Q: How many parts does A process per hour?
甲、乙二人2时共可加工54个零件，甲加工3时的零件比乙加工4时的零件还多4个．问：甲每时加工多少个零件？
<gadget id="calculator">54 / 2</gadget>
<output>27</output>

<gadget id="calculator">27 * 4</gadget>
<output>108</output>

<gadget id="calculator">108 + 4</gadget>
<output>112</output>

<gadget id="calculator">3 + 4</gadget>
<output>7</output>

<gadget id="calculator">112 / 7</gadget>
<output>16</output>

<result>16</result>