To prepare a medicine, the ratio of medicine powder to water is 1:40. If you want to prepare 1025 grams of medicine, how many grams of medicine powder are needed.
配制一种药水，药粉和水的比是1：40，如果要配制1025克的药水，需要药粉多少克．
<gadget id="calculator">1 + 40</gadget>
<output>41</output>

<gadget id="calculator">1 / 41</gadget>
<output>1/41 = around 0.02439</output>

<gadget id="calculator">1_025 * (1/41)</gadget>
<output>25</output>

<result>25</result>