To pave a village road from Niejiang to Guiya, the original plan was to pave 800 meters per day and finish paving in 6 days. The actual pavement is completed in 4 days, how many meters more than the original plan is actually paved every day?
铺一条从乜江到桂芽的通村公路，原计划每天铺800米，6天铺完．实际4天铺完，实际每天比原计划多铺多少米？
<gadget id="calculator">6 - 4</gadget>
<output>2</output>

<gadget id="calculator">2 / 4</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">800 * (1/2)</gadget>
<output>400</output>

<result>400</result>