Define A⊕B=((A+B)/2), then (3⊕4)⊕(5⊕6)=how much.
定义A⊕B=((A+B)/2)，则(3⊕4)⊕(5⊕6)=多少．
<gadget id="calculator">7 / 2</gadget>
<output>7/2 = around 3.5</output>

<gadget id="calculator">11 / 2</gadget>
<output>11/2 = around 5.5</output>

<gadget id="calculator">(7/2) + (11/2)</gadget>
<output>9</output>

<gadget id="calculator">9 / 2</gadget>
<output>9/2 = around 4.5</output>

<result>9/2 = around 4.5</result>