求解 -7pi/9pi/180 | Microsoft Math Solver

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\frac{-7\pi \pi }{9\times 180}

-\frac{7\pi }{9} 乘以 \frac{\pi }{180} 的计算方法是，将两数分子与分子相乘得到分子，分母与分母相乘得到分母。

\frac{-7\pi ^{2}}{9\times 180}

将 \pi 与 \pi 相乘，得到 \pi ^{2}。

\frac{-7\pi ^{2}}{1620}

将 9 与 180 相乘，得到 1620。

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