The temperature at which water boils is 100°C, which is called the boiling point of water. The boiling point of alcohol is 22°C lower than that of water. What is the boiling point of alcohol in °C.
水沸腾的温度是100℃，称为水的沸点，酒精的沸点比水低22℃，酒精的沸点是多少℃．
<gadget id="calculator">100 - 22</gadget>
<output>78</output>

<result>78</result>