The students in the experimental primary school planted 120 trees, and the number of trees planted by the students in the national primary school was 12 times less than that in the experimental primary school. How many trees did the students in the national primary school plant?
实验小学的同学栽了120棵树，民族小学的同学栽树的棵数是实验小学的2倍少12棵，民族小学的同学栽了多少棵树？
<gadget id="calculator">120 * 2</gadget>
<output>240</output>

<gadget id="calculator">240 - 12</gadget>
<output>228</output>

<result>228</result>