When x=how much, the number of columns and rows represented by the pair (2x+2, x+3) is the same.
当x=多少时，数对(2x+2，x+3)表示的列数和行数相同．
<gadget id="calculator">3 - 2</gadget>
<output>1</output>

<gadget id="calculator">2 - 1</gadget>
<output>1</output>

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

<result>1</result>