Suppose a△b=a**2-2b, then (8△7)△246=how much.
设a△b=a**2-2b，那么(8△7)△246=多少．
<gadget id="calculator">8 ** 2</gadget>
<output>64</output>

<gadget id="calculator">2 * 7</gadget>
<output>14</output>

<gadget id="calculator">64 - 14</gadget>
<output>50</output>

<gadget id="calculator">50 ** 2</gadget>
<output>2_500</output>

<gadget id="calculator">2 * 246</gadget>
<output>492</output>

<gadget id="calculator">2_500 - 492</gadget>
<output>2_008</output>

<result>2_008</result>