A certain school planted 50 trees last year, and planted 68 trees this year. How much more trees are planted this year than last year?
某校去年植树50棵，今年植树68棵，今年植树比去年增加了多少．
<gadget id="calculator">68 - 50</gadget>
<output>18</output>

<gadget id="calculator">18 / 50</gadget>
<output>9/25 = around 0.36</output>

<result>9/25 = around 0.36</result>