Xingfu Primary School planted 86 trees the year before last, and the number of trees planted last year was twice that of the year before. This year, 30 more trees were planted than last year. How many trees are planted this year?
幸福小学前年植树86棵，去年植树的棵数是前年的2倍，今年比去年又多植树30棵，今年植树多少棵？
<gadget id="calculator">86 * 2</gadget>
<output>172</output>

<gadget id="calculator">172 + 30</gadget>
<output>202</output>

<result>202</result>