5406.1460*1.356
    5406.1460*0.8385
    (2.25×0.1331×107.76^2)/(102×2×9.81)
    527770/(π/4×653400)
    (1+0.05108)/1.148
    479.01/3600
    211.11/（0.04616-0.00711）
    0.701×1.81×10^(-5)
    1/(0.04616-0.00711)
    (1+0.00711)/1.437
    (527.77×10^3)/(π/4×5.5^2×6×3600)
    0.238075*6.333
    ((7.57×10^(-5) )^2×(1120-0.808)×9.81)/(18×1.791×10^(-5)×0.808)
    (4×7.57×10^(-5)×1120)/(3×0.523×0.9085)
    ((1+0.00711)/1.437+(1+0.05108)/1.148)/2
    18.5/380^0.6
    1289330.1138/(1651.7*0.95)
    1026896.129/(1761.8*0.9248）
    (7.57×10^(-5)×110.06×0.9085 )/(1.99×10^(-5) )
    √(107.7 6 ^2+20.842^2)=

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