In order to beautify the campus environment, the school planted 60 sweet-scented osmanthus trees and 30 pines and cypresses. The number of camphor trees planted was three times the total number of sweet-scented osmanthus trees and pines and cypresses. How many camphor trees were planted?
为美化校园环境，学校栽了60棵桂花树，30棵松柏，栽的樟树的棵数是桂花树和松柏总数的3倍，栽了多少棵樟树？
<gadget id="calculator">60 + 30</gadget>
<output>90</output>

<gadget id="calculator">90 * 3</gadget>
<output>270</output>

<result>270</result>