A batch of parts is completed by the cooperation of A and B in 30 days. A first makes 22 days, and the two work together for 12 days. The remaining B will work alone for 16 days to complete. It is also known that A produces 4 fewer parts than B every day. When the task is completed in this way, how many parts does B make in total?
一批零件，由甲，乙两人合作30天完成，甲先做22天，两人再合作12天，剩下的乙单独还要干16天才全部完成．又知甲每天比乙少生产4个零件，问照这样完成任务时，乙共做了多少个零件？
<gadget id="calculator">4 * 30</gadget>
<output>120</output>

<gadget id="calculator">12 * 4</gadget>
<output>48</output>

<gadget id="calculator">16 * 4</gadget>
<output>64</output>

<gadget id="calculator">120 - 48 - 64</gadget>
<output>8</output>

<gadget id="calculator">16 - 30 - 30</gadget>
<output>-44</output>

<gadget id="calculator">22 + 12 + 12 + (-44)</gadget>
<output>2</output>

<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 + 4</gadget>
<output>8</output>

<gadget id="calculator">12 + 16</gadget>
<output>28</output>

<gadget id="calculator">8 * 28</gadget>
<output>224</output>

<result>224</result>