In order to disinfect the classroom, 5010 ml of "84' disinfectant solution needs to be prepared. If the ratio of stock solution to water is 1:500, how many milliliters of the stock solution is needed?
为给教室消毒，需要配制5010毫升的"84’消毒液．如果原液与水的比是1：500，需要原液多少毫升？
<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">5_010 * (1/501)</gadget>
<output>10</output>

<result>10</result>