A certain village planted 4000 square meters of peanuts last year, and this year there are more varieties than last year (1/5). How much more square meters is this year than last year?
某村去年种花生4000平方米，今年比去年多种(1/5)．今年比去年多种多少平方米？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">4_000 * (1/5)</gadget>
<output>800</output>

<result>800</result>