If 10 grams of medicine powder is dissolved in 40 grams of water, what is the drug content of the medicine?
10克药粉溶于40克水中，药水的含药率是多少．
<gadget id="calculator">10 + 40</gadget>
<output>50</output>

<gadget id="calculator">10 / 50</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">(1/5) * 1</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>