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9*22/7 = 28.285714
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unless you know the value of x you cant solve it so its just 4(pie)x "Pi" is just a number. The product of 4 times (pi) times 'x' depends on the value of ' x ', and it changes immediately as soon as the value of ' x ' changes.
One third times pi can be calculated by multiplying 1/3 by the value of pi, which is approximately 3.14159. Therefore, 1/3 times pi equals approximately 1.0472. This can be simplified to the fraction 10472/10000 or the mixed number 1 and 472/10000.
the same as pi squared, which is 9.86960440109
The area of the circle becomes 9 times the area of the original circle. Original circle = Pi * (r ^ 2) = Pi * r * r New Circle = Pi * ((3 * r) ^ 2) = Pi * 9 * r * r
You either keep it as "89 pi" to have the exact value, or you take the desired number of decimals for pi (depending on the desired precision), for example 3.14, or 3.1416, and then multiply.