A liquid medicine for spraying fruit trees, the ratio of pure liquid medicine to water is 1:200, to prepare 60.3 kg of this liquid medicine, how many grams of pure liquid medicine is needed.
一种喷洒果树的药水，纯药液和水的比是1：200，要配置这种药水60.3千克，需纯药液多少克．
<gadget id="calculator">1 + 200</gadget>
<output>201</output>

<gadget id="calculator">1 / 201</gadget>
<output>1/201 = around 0.004975</output>

<gadget id="calculator">60.3 * (1/201) * 1_000</gadget>
<output>300</output>

<result>300</result>