Evaluate
21750\pi \approx 68329.640215578
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20000\pi +2\pi \times 25\times 35
Multiply 32 and 625 to get 20000.
20000\pi +50\pi \times 35
Multiply 2 and 25 to get 50.
20000\pi +1750\pi
Multiply 50 and 35 to get 1750.
21750\pi
Combine 20000\pi and 1750\pi to get 21750\pi .
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