Four degrees Celsius is 40 Fahrenheit, and 40 Celsius is 104 Fahrenheit. So if you're on vacation and you hear it’s going to be 32 today, you know that that’s more than 28 (82 Fahrenheit) but ...

For example, while 32 degrees Fahrenheit = 0 degrees Celsius, 35 degrees Fahrenheit = 1.6 degrees Celsius, which would likely be rounded up to 2°C to avoid having to use decimals.