In a certain place, 240 hectares of trees were planted this year, an increase of 50% compared with last year. How many hectares of trees were planted last year?
某地今年植树240公顷，比去年增加50%，去年植树多少公顷？
<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 + (1/2)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">240 / (3/2)</gadget>
<output>160</output>

<result>160</result>