A certain orchard planted more trees this year than last year (2/5). This year planted 350 trees. How many trees were planted last year?
某果园今年植树棵树比去年多(2/5)，今年植树350棵，去年植树多少棵？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 + (2/5)</gadget>
<output>7/5 = around 1.4</output>

<gadget id="calculator">350 / (7/5)</gadget>
<output>250</output>

<result>250</result>