The greening team planted 120 pine trees on the Arbor Day, and the number of metasequoia trees was 50 less than twice that of pine trees. How many trees were planted in total?
绿化队在植树节栽了120棵松树，栽水杉的棵数比松树的2倍少50棵，两种树共栽了多少棵？
<gadget id="calculator">120 * 2</gadget>
<output>240</output>

<gadget id="calculator">240 - 50</gadget>
<output>190</output>

<gadget id="calculator">190 + 120</gadget>
<output>310</output>

<result>310</result>