To prepare a pesticide, the ratio of powder to water is 1:500, and there is 6000 kg of water, how many kg of powder is needed to prepare this pesticide?
配制一种农药，药粉和水的比是1：500，现有水6000千克，配制这种农药需要药粉多少千克？
<gadget id="calculator">1 / 500</gadget>
<output>1/500 = around 0.002</output>

<gadget id="calculator">6_000 * (1/500)</gadget>
<output>12</output>

<result>12</result>