Xiao Zhang's labor production technology is constantly improving. He produces 30 parts on the first day, 32 parts on the second day, and 34 parts on the third day... In this way, he increases by 2 every day. How many parts should he produce on the 12th day indivual.
小张的劳动生产技术不断提高，第一天生产零件30个，第二天生产零件32个，第三天生产零件34个…，照这样，每天增加2个，他第12天应生产零件多少个．
<gadget id="calculator">12 - 1</gadget>
<output>11</output>

<gadget id="calculator">11 * 2</gadget>
<output>22</output>

<gadget id="calculator">30 + 22</gadget>
<output>52</output>

<result>52</result>