A certain disinfectant is prepared according to the ratio of water and disinfectant at 5:1. To prepare 2400 grams of such disinfectant, how many grams of disinfectant are needed?
某种消毒液按水与消毒药5：1的比例配制而成，要配制这样的消毒液2400克，需要消毒药多少克？
<gadget id="calculator">5 + 1</gadget>
<output>6</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">2_400 * (1/6)</gadget>
<output>400</output>

<result>400</result>