The grain output of the land contracted by Xiaoming’s family has increased by 20% this year compared to last year. Last year’s grain output was 4,000 kilograms. How many kilograms can they harvest this year?
小明家承包的土地今年粮食产量比去年增产二成，去年产粮4000千克，今年能收多少千克？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">4_000 * (6/5)</gadget>
<output>4_800</output>

<result>4_800</result>