A liquid medicine should be formulated according to the weight ratio of pesticide and water 1:400, how many kilograms of pesticide should be put in 240 kilograms of water?
一种药水要按农药和水的重量比1：400配置成，则在240千克水中，应放入农药多少千克？
<gadget id="calculator">1 / 400</gadget>
<output>1/400 = around 0.0025</output>

<gadget id="calculator">(1/400) * 240</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>