Given the integers a, b, a△b=a*ba-b+1, then (2△3)△2=how many.
已知整数a，b，a△b=a*b-a-b+1，则(2△3)△2=多少．
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">4 - 2 - 2</gadget>
<output>0</output>

<gadget id="calculator">0 + 1</gadget>
<output>1</output>

<result>1</result>