计算图中阴影部分的面积 六年级急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急

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计算图中阴影部分的面积 六年级
急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用急用!

10÷2=5
5×5×3.14=78.5
4÷2=2
2×2×3.14=12.56
78.5-12.56=65.94