The result of your conversion between full circle and 1/4 circle appears here
To convert between Full Circle and 1/4 Circle you have to do the following:
First divide (2*Math.PI) / (Math.PI/2) = 4.
Then multiply the amount of Full Circle you want to convert to 1/4 Circle, use the chart below to guide you.
Symbol: cir
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Symbol: per 4 circle
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