It is stipulated that a*b=3a-(1/2)b, where a and b are natural numbers, what is the value of 10*6.
规定a※b=3a-(1/2)b，其中a，b是自然数，10※6的值是多少．
<gadget id="calculator">3 * 10</gadget>
<output>30</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">6 * (1/2)</gadget>
<output>3</output>

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

<result>27</result>