A kind of medicine, the mass ratio of medicine powder and water is 1:16, now to prepare 286 grams of medicine, how many grams of medicine powder is needed?
一种药水，药粉和水的质量比是1：16，现在要配制286克药水，需要药粉多少克？
<gadget id="calculator">1 + 16</gadget>
<output>17</output>

<gadget id="calculator">1 / 17</gadget>
<output>1/17 = around 0.058824</output>

<gadget id="calculator">286 * (1/17)</gadget>
<output>286/17 = around 16.823529</output>

<result>286/17 = around 16.823529</result>