Definition: a△b=ab-3b, a▽b=4a-((b)/(a)), calculation: (4△3)△(2▽6).
定义：a△b=ab-3b，a▽b=4a-((b)/(a))，计算：(4△3)△(2▽6)．
<gadget id="calculator">4 * 3</gadget>
<output>12</output>

<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<gadget id="calculator">12 - 9</gadget>
<output>3</output>

<gadget id="calculator">23 / 3</gadget>
<output>23/3 = around 7.666667</output>

<gadget id="calculator">7 * (23/3)</gadget>
<output>161/3 = around 53.666667</output>

<gadget id="calculator">3 * (23/3)</gadget>
<output>23</output>

<gadget id="calculator">(161/3) - 23</gadget>
<output>92/3 = around 30.666667</output>

<result>92/3 = around 30.666667</result>