To process a batch of parts, 120 parts are processed every day in the first 2 days, and 420 parts are processed in the next 3 days. How many parts are processed on average in these 5 days?
加工一批零件，前2天每天加工120个，后3天共加工420个，这5天平均每天加工多少个零件．
<gadget id="calculator">120 * 2</gadget>
<output>240</output>

<gadget id="calculator">240 + 420</gadget>
<output>660</output>

<gadget id="calculator">660 / 5</gadget>
<output>132</output>

<result>132</result>