Evaluate
\frac{39\pi }{4}\approx 30.630528373
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\pi \times 2.25+2\pi \times 1.5\times 2.5
Calculate 1.5 to the power of 2 and get 2.25.
\pi \times 2.25+3\pi \times 2.5
Multiply 2 and 1.5 to get 3.
\pi \times 2.25+7.5\pi
Multiply 3 and 2.5 to get 7.5.
9.75\pi
Combine \pi \times 2.25 and 7.5\pi to get 9.75\pi .
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