Put 5 grams of medicine into 100 grams of water, so that the ratio of medicine to liquid medicine is 1:11, how many grams of medicine need to be added.
把5克药放入100克水中，要使药和药水的比是1：11，需再加入多少克药．
<gadget id="calculator">1 / 11</gadget>
<output>1/11 = around 0.090909</output>

<gadget id="calculator">(1/11) * 100</gadget>
<output>100/11 = around 9.090909</output>

<gadget id="calculator">(1/11) * 5</gadget>
<output>5/11 = around 0.454545</output>

<gadget id="calculator">(5/11) - 5</gadget>
<output>-50/11 = around -4.545455</output>

<gadget id="calculator">(100/11) + (-50/11)</gadget>
<output>50/11 = around 4.545455</output>

<gadget id="calculator">1 - (1/11)</gadget>
<output>10/11 = around 0.909091</output>

<gadget id="calculator">(50/11) / (10/11)</gadget>
<output>5</output>

<result>5</result>