Pi for everybody! 3.1415926535897932384626433832795028841971693993751058 20974944592307816406286… possibilities for fun.
For mathletes:
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Keep Calm and Love Math
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Pi for everybody! 3.1415926535897932384626433832795028841971693993751058 20974944592307816406286… possibilities for fun.
Disney / Via pedestrian.tv
Get it here.