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\frac{\pi }{4}\times 7396\times 2.5
Tātaihia te 86 mā te pū o 2, kia riro ko 7396.
\frac{\pi }{4}\times 18490
Whakareatia te 7396 ki te 2.5, ka 18490.
\frac{\pi \times 18490}{4}
Tuhia te \frac{\pi }{4}\times 18490 hei hautanga kotahi.
\pi \times \frac{9245}{2}
Whakawehea te \pi \times 18490 ki te 4, kia riro ko \pi \times \frac{9245}{2}.