A kind of pesticide is prepared by mixing liquid medicine and water at a ratio of 1:750. If there are 4 kilograms of liquid medicine, how many kilograms of this pesticide can be prepared?
一种农药，用药液和水按照1：750配置而成，如果现在有4千克药液，能配置这种农药多少千克？
<gadget id="calculator">1 / 750</gadget>
<output>1/750 = around 0.001333</output>

<gadget id="calculator">4 / (1/750)</gadget>
<output>3_000</output>

<gadget id="calculator">3_000 + 4</gadget>
<output>3_004</output>

<result>3_004</result>