a※b means a*5-b/2, so what should (10※6)※8 be equal to?
a※b表示a*5-b/2，那么(10※6)※8应等于多少．
<gadget id="calculator">10 * 5</gadget>
<output>50</output>

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

<gadget id="calculator">50 - 3</gadget>
<output>47</output>

<gadget id="calculator">47 * 5</gadget>
<output>235</output>

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

<gadget id="calculator">235 - 4</gadget>
<output>231</output>

<result>231</result>