It is known that a=b*1.8+32, (a means Fahrenheit temperature, b means Celsius temperature), how much is 98.6 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98.6度相当于摄氏多少度．
<gadget id="calculator">98.6 - 32</gadget>
<output>66.6</output>

<gadget id="calculator">66.6 / 1.8</gadget>
<output>37</output>

<result>37</result>