On April 29, 2011, Prince William of the United Kingdom got married. There were as many as 1,900 dignitaries from various countries present, which was unprecedentedly grand. At the wedding banquet, the bartender prepared some 45% alcoholic cocktails for the guests, which were greatly appreciated. There were only two guests who were not good at drinking, one of them dared to drink freely after adding a certain amount of soda to dilute the alcohol to 36%, and the other was even worse, adding 2 servings of the same amount of soda before he dared to drink. Those who are not very strong drinkers drink cocktails with a certain degree.
2011年4月29日，英国威廉王子大婚，到场的各国政要多达1900人，盛况空前．在婚宴上，调酒师为宾客准备了一些酒精度为45%的鸡尾酒，大受赞赏．唯独有2位酒量不佳的宾客，一位在酒里加入一定量的汽水稀释成度数为36%才敢畅饮，另一位则更不济，加入2份同样多的汽水才敢饮用，这位不甚酒力者喝的是度数为多少的鸡尾酒．
<gadget id="calculator">45 / 100</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">100 * (9/20)</gadget>
<output>45</output>

<gadget id="calculator">36 / 100</gadget>
<output>9/25 = around 0.36</output>

<gadget id="calculator">45 / (9/25)</gadget>
<output>125</output>

<gadget id="calculator">125 - 100</gadget>
<output>25</output>

<gadget id="calculator">25 * 2</gadget>
<output>50</output>

<gadget id="calculator">100 + 50</gadget>
<output>150</output>

<gadget id="calculator">45 / 150</gadget>
<output>3/10 = around 0.3</output>

<result>3/10 = around 0.3</result>