The sixth grade students planted 120 trees last year, an increase of 15% this year compared to last year. How many trees are planted this year?
六年级同学去年植树120棵，今年比去年增加了15%，今年植树多少棵．
<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 + (3/20)</gadget>
<output>23/20 = around 1.15</output>

<gadget id="calculator">120 * (23/20)</gadget>
<output>138</output>

<result>138</result>