A potion is made by mixing powder and water in a ratio of 1:100. To be mixed with 404 kilograms of this liquid medicine, how many kilograms of medicinal powder are needed?
一种药水是把药粉和水按照1：100的比配成的．要配制成这种药水404千克，需要药粉多少千克？
<gadget id="calculator">1 + 100</gadget>
<output>101</output>

<gadget id="calculator">1 / 101</gadget>
<output>1/101 = around 0.009901</output>

<gadget id="calculator">404 * (1/101)</gadget>
<output>4</output>

<result>4</result>