The happiness apple orchard produced 28 tons of apples last year. Due to the typhoon this year, the output decreased by 20% compared to last year. How many tons of apples does Happy Apple Orchard produce this year?
幸福苹果园去年产苹果28吨，由于今年遭受风灾，产量比去年减少二成．幸福苹果园今年产苹果多少吨？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">28 * (4/5)</gadget>
<output>112/5 = around 22.4</output>

<result>112/5 = around 22.4</result>