The farm has a rectangular vegetable field with a length of 580 meters and a width of 425 meters. If 20 grams of chemical fertilizer is applied per square meter. How many kilograms of fertilizer do you need to apply to this land?
农场有一片长580米，宽425米的长方形菜地，如果每平方米要施化肥20克．这块地共需施化肥多少千克？
<gadget id="calculator">580 * 425</gadget>
<output>246_500</output>

<gadget id="calculator">246_500 * 0.02</gadget>
<output>4_930</output>

<result>4_930</result>