Define a new operation, a*b=a*b+a+b, find the value of (1*2)*3.
定义新运算，a※b=a*b+a+b，求(1※2)※3的值是多少．
<gadget id="calculator">1 * 2</gadget>
<output>2</output>

<gadget id="calculator">2 + 1 + 2</gadget>
<output>5</output>

<gadget id="calculator">5 * 3</gadget>
<output>15</output>

<gadget id="calculator">15 + 5 + 3</gadget>
<output>23</output>

<result>23</result>