pesticide is prepared by mixing liquid medicine and water at a ratio of 1:1000. If 5005 kg of pesticide is to be prepared, how many kilograms of water are needed?
一种农药，用药液和水按照1：1000配制而成，如果要配制5005千克的农药，需要水多少千克？
<gadget id="calculator">1 + 1_000</gadget>
<output>1_001</output>

<gadget id="calculator">1_000 / 1_001</gadget>
<output>1_000/1_001 = around 0.999001</output>

<gadget id="calculator">5_005 * (1_000/1_001)</gadget>
<output>5_000</output>

<result>5_000</result>