A bag of candy is equally distributed to two brothers. When the elder brother finishes eating, he sees that the younger brother has not finished eating, so he takes two of the younger brother. They finish eating at the same time. The ratio of the amount eaten by the older brother to the younger brother is 5:4. How many did my brother eat?
一袋糖果平均分给兄弟两个吃，哥哥吃完时看弟弟还没有吃完于是就拿弟弟的两个，两人同时吃完了，吃完时哥哥与弟弟吃的数量比是5：4，弟弟吃了多少个？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">5 + 4</gadget>
<output>9</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">(1/2) - (4/9)</gadget>
<output>1/18 = around 0.055556</output>

<gadget id="calculator">2 / (1/18)</gadget>
<output>36</output>

<gadget id="calculator">36 * (4/9)</gadget>
<output>16</output>

<result>16</result>