Let a and b represent two different numbers, and stipulate: a△b=3a+4b, then what is (8△7)△6.
设a，b表示两个不同的数，规定：a△b=3a+4b，则(8△7)△6是多少．
<gadget id="calculator">3 * 8</gadget>
<output>24</output>

<gadget id="calculator">4 * 7</gadget>
<output>28</output>

<gadget id="calculator">24 + 28</gadget>
<output>52</output>

<gadget id="calculator">3 * 52</gadget>
<output>156</output>

<gadget id="calculator">4 * 6</gadget>
<output>24</output>

<gadget id="calculator">156 + 24</gadget>
<output>180</output>

<result>180</result>