Do you know the quick little trick for converting celsius to fahrenheit? Granted here in the US we don't use celsius often, but it's still a fun party trick to know and it's simple - multiply by 2 and add 30 to get the estimated temperature.
For instance - 20' celsius, double the number (40) and add 30 = 70' fahrenheit (the actual number when I googled it is 68 - see, pretty close!)
Reverse the formula to go from fahrenheit to celsius - 70' fahrenheit, subtract 30 (=40), divide in half = 20 celsius.
You know you're going to amaze people when you can quickly convert the temp, who knew how smart you are?!! :)
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