Master Jiang produces a batch of parts, and 126 parts are produced in the first 3 days. According to this calculation, the production task will be completed in another 12 days. How many parts are there in total?
蒋师傅生产一批零件，前3天生产零件126件，照这样计算，再生产12天完成生产任务．这批零件共有多少件？
<gadget id="calculator">126 / 3</gadget>
<output>42</output>

<gadget id="calculator">3 + 12</gadget>
<output>15</output>

<gadget id="calculator">42 * 15</gadget>
<output>630</output>

<result>630</result>