a※b means a*3-b/2, so what should (10※6)※8 be equal to
a※b表示a*3-b/2，那么(10※6)※8应等于多少
<gadget id="calculator">10 * 3</gadget>
<output>30</output>

<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">30 - 3</gadget>
<output>27</output>

<gadget id="calculator">27 * 3</gadget>
<output>81</output>

<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">81 - 4</gadget>
<output>77</output>

<result>77</result>