To prevent Influenza A (H1N1), a disinfectant solution was prepared according to the standard ratio of medicine powder and water of 1:40. With 20 grams of existing medicinal powder, how many grams of disinfectant can be prepared.
为预防甲型H1N1流感，按药粉和水的比为1：40的标准配制消毒液．现有药粉20克，可以配制出多少克消毒液．
<gadget id="calculator">1 + 40</gadget>
<output>41</output>

<gadget id="calculator">20 * 41</gadget>
<output>820</output>

<result>820</result>