Put 300 grams of medicine powder into 1300 grams of water, how much medicine powder accounts for the medicine water.
把300克药粉放入1300克水中，药粉占药水的多少．
<gadget id="calculator">1_300 + 300</gadget>
<output>1_600</output>

<gadget id="calculator">300 / 1_600</gadget>
<output>3/16 = around 0.1875</output>

<result>3/16 = around 0.1875</result>