This is super convoluted to some people, but its the easiest way for my weird American brain to convert it on the fly:

1. 2*°C=ans1
2. ans1—(0.1*ans1)=ans2
3. ans2—32=°F

The conversion most sources give you is:

(9/5)*°C—32=°F

But I find it easier to break it down into those 3 simple steps. If you're the kind of person who calculates 20% of X in two steps [20%*X=(0.1X)*2], you might also like my weird method of converting °C to °F.

This is a mild tangent but I learned how to convert celsius to fahrenheit because of a Codename: Kids Next Store episode that I watched once wherein a character says "30c, 30 celsius that's like 80 degrees fahrenheit". Which is honestly not the weirdest thing to learn from but it is my number one.