Definition: a⊕b=a+b+ab, what is the value of (2⊕3)⊕4?
定义：a⊕b=a+b+ab，则(2⊕3)⊕4的值为多少．
<gadget id="calculator">2 * 3</gadget>
<output>6</output>

<gadget id="calculator">2 + 3 + 6</gadget>
<output>11</output>

<gadget id="calculator">11 * 4</gadget>
<output>44</output>

<gadget id="calculator">11 + 4 + 44</gadget>
<output>59</output>

<result>59</result>