The conversion formula between Fahrenheit (℉) and Celsius (°C) is: Fahrenheit = Celsius * 1.8 + 32, the highest temperature today is 69.8°F, what is the equivalent in °C.
华氏温度(℉)和摄氏温度(℃)换算公式是：华氏温度=摄氏温度*1.8+32，今天的最高气温是69.8°F，那么相当于多少℃．
<gadget id="calculator">69.8 - 32</gadget>
<output>37.8</output>

<gadget id="calculator">37.8 / 1.8</gadget>
<output>21</output>

<result>21</result>