A disinfectant, prepared according to 1:50 liquid medicine and water. If you want to configure 153 kilograms of disinfectant now, how many kilograms of liquid medicine are needed?
一种消毒剂，用药液和水按照1：50配制而成．如果现在要配置153千克的消毒剂，需要药液多少千克？
<gadget id="calculator">1 + 50</gadget>
<output>51</output>

<gadget id="calculator">1 / 51</gadget>
<output>1/51 = around 0.019608</output>

<gadget id="calculator">153 * (1/51)</gadget>
<output>3</output>

<result>3</result>