A kind of pesticide is prepared by mixing medicine and water at a ratio of 1:100. To prepare 505 kilograms of pesticide, how many kilograms of pesticide are needed?
一种农药，用药和水按1：100配制而成，要配制505千克农药，需要药多少千克？
<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">505 * (1/101)</gadget>
<output>5</output>

<result>5</result>