Uncle Wang fertilizes a paddy field with a length of 800 meters and a width of 400 meters, and fertilizes 250 kilograms per hectare. How many kilograms of fertilizer should be applied in total?
王大爷给一块长800米，宽400米的稻田施肥，每公顷施肥250千克，一共应施肥多少千克？
<gadget id="calculator">400 / 10_000</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">250 * 800 * (1/25)</gadget>
<output>8_000</output>

<result>8_000</result>