20,40 \times 2,10 ^ { 2 } \times \pi
Evaluate
4080\pi \approx 12817.698026646
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40,8\times 10^{2}\pi
Multiply 20,4 and 2 to get 40,8.
40,8\times 100\pi
Calculate 10 to the power of 2 and get 100.
4080\pi
Multiply 40,8 and 100 to get 4080.
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