It is known that A★B=(1/5)*A+B/2.5, then what is 2.5★(5/2)=.
已知A★B=(1/5)*A+B/2.5，则2.5★(5/2)=多少．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) * 2.5</gadget>
<output>0.5</output>

<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">(5/2) / 2.5</gadget>
<output>1</output>

<gadget id="calculator">0.5 + 1</gadget>
<output>1.5</output>

<result>1.5</result>