Of Celsius and Fahrenheit
|° F||° C|
Tell a doctor in Italy that you're running a fever of 102°, and he won't believe you—because 102° Celsius is equivalent to 216° Fahrenheit, which means your brain would be fried faster than that egg in the old "...this is your brain on drugs" commercials.
And if the local news reports that tomorrow's temperature will be around 32°, that's means it'll be shorts and T-shirt weather, not time to buy a down parka—32° degrees Celsius is 90° Fahrenheit.
The bad news about temperatures is that there is no simple formula to convert Celsius (sometimes called "centigrade") to Fahrenheit and back.
There is a formula, of course, but it ain't the sort of thing you'd want to do in your head.
Take the Celsius amount, multiply it by 1.8, then add 32.
See, wasn't that easy?
If math is one of the things you're taking a vacation from, the chart on the right can help you ballpark things.