\pi \times 0,65 ^ { 2 } \times 1,25
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\pi \times 0\times 4225\times 1,25
Calculate 65 to the power of 2 and get 4225.
\pi \times 0\times 1,25
Multiply 0 and 4225 to get 0.
\pi \times 0
Multiply 0 and 1,25 to get 0.
0
Anything times zero gives zero.
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