Uncle Wang picked 720 kilograms of oranges this year, an increase of 60% compared to last year. How many kilograms of oranges did he harvest last year?
王伯伯今年采摘桔子720千克，比去年增长六成，他去年收获桔子多少千克？
<gadget id="calculator">60 / 100</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 + (3/5)</gadget>
<output>8/5 = around 1.6</output>

<gadget id="calculator">720 / (8/5)</gadget>
<output>450</output>

<result>450</result>