To prepare a medicine, the ratio of medicine powder to water is 1:500. To prepare 40080 kilograms of this medicine, how many kilograms of medicine powder are needed?
配制一种药水，药粉与水的比是1：500，要配制这种药水40080千克，需要药粉多少千克？
<gadget id="calculator">1 + 500</gadget>
<output>501</output>

<gadget id="calculator">1 / 501</gadget>
<output>1/501 = around 0.001996</output>

<gadget id="calculator">40_080 * (1/501)</gadget>
<output>80</output>

<result>80</result>