The students greened the campus. The second grade planted 58 trees, and the third grade planted 15 more trees than the second grade. How many trees were planted in the third grade?
同学们绿化校园，二年级种树58棵，三年级种的棵数比二年级的2倍还多15棵，三年级种树多少棵．
<gadget id="calculator">58 * 2</gadget>
<output>116</output>

<gadget id="calculator">116 + 15</gadget>
<output>131</output>

<result>131</result>