It is known that a=b*1.8+32, (a represents Fahrenheit temperature, b represents Celsius temperature) how much is 36.5 degrees Fahrenheit equivalent to Celsius.
已知a=b*1.8+32，(a表示华氏温度，b表示摄氏温度)华氏36.5度相当于摄氏多少度．
<gadget id="calculator">36.5 - 32</gadget>
<output>4.5</output>

<gadget id="calculator">4.5 / 1.8</gadget>
<output>2.5</output>

<result>2.5</result>