If define P☆Q=5P+3Q, P¤Q=3P-5Q, then (3¤(2/3))☆0.6=how many.
若定义P☆Q=5P+3Q，P¤Q=3P-5Q，那么(3¤(2/3))☆0.6=多少．
<gadget id="calculator">17 / 3</gadget>
<output>17/3 = around 5.666667</output>

<gadget id="calculator">5 * (17/3)</gadget>
<output>85/3 = around 28.333333</output>

<gadget id="calculator">3 * 0.6</gadget>
<output>1.8</output>

<gadget id="calculator">(85/3) + 1.8</gadget>
<output>30.133333</output>

<result>30.133333</result>