The school bought 4 computers and spent 12,200 yuan. The school wants to buy 3 more computers like this. How much money does it need to prepare?
学校买了4台电脑用了12200元，学校还想再买3台这样的电脑，还需要准备多少钱？
<gadget id="calculator">12_200 / 4</gadget>
<output>3_050</output>

<gadget id="calculator">3_050 * 3</gadget>
<output>9_150</output>

<result>9_150</result>