The orchard harvested 21.6 tons of fruit this year, an increase of 80% over last year. How many tons of fruit has been increased this year?
果园今年收水果21.6吨，比去年增产80%，今年水果增产多少吨？
<gadget id="calculator">80 / 100</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 + (4/5)</gadget>
<output>9/5 = around 1.8</output>

<gadget id="calculator">21.6 / (9/5)</gadget>
<output>12</output>

<gadget id="calculator">12 * (4/5)</gadget>
<output>48/5 = around 9.6</output>

<result>48/5 = around 9.6</result>