If a=4, b=3, then what is the value of 2a+b.
如果a=4，b=3，那么2a+b的值是多少．
<gadget id="calculator">2 * 4</gadget>
<output>8</output>

<gadget id="calculator">8 + 3</gadget>
<output>11</output>

<result>11</result>