bag of chocolates, the elder brother took (1/2) more than 3 yuan, and the younger brother took the remaining (1/2) more than 3 yuan, just took all of them. How many pieces of chocolate did the two brothers take together?
一袋巧克力，哥哥拿走了其中的(1/2)多3块，弟弟拿走了余下的(1/2)多3块，正好的全部拿完．兄弟二人一共拿走了多少块巧克力？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) * 3</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">3 - (3/2)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">3 + (3/2)</gadget>
<output>9/2 = around 4.5</output>

<gadget id="calculator">(1/2) * (1/2)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/2) - (1/2)</gadget>
<output>0</output>

<gadget id="calculator">(1/4) + 0</gadget>
<output>1/4 = around 0.25</output>

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

<result>18</result>