It is stipulated that a*b=a*3-b/2, find (10*6)*12.
规定a*b=a*3-b/2，求(10*6)*12．
<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">12 / 2</gadget>
<output>6</output>

<gadget id="calculator">81 - 6</gadget>
<output>75</output>

<result>75</result>