-2√(2×9.81×0.005×0.225 )×log(10,((0.0003/(3.7×0.225 )+(2.5×1.14×10^(-6))/(0.225×√(2×9.81×0.005×0.225 )))
    arcsin0
    (2.25/30)×(311.35×80.87^2×729.13^2×0.8×40/1.312)^（1/3）
    12.5×311.35×40×0.65/(80.87×1.31^2)
    12.5×311.35×40×0.65/(80.87×1.312)
    0.278*1.3*37.11*(2021*0.46+1058*0.5+600*0.66+1600*0.43+1815*0.71+1815*0.38+2856*0.39+3360*0.57)
    0.278*1.3*10^-6*37.11*(2021*0.46+1058*0.5+600*0.66+1600*0.43+1815*0.71+1815*0.38+2856*0.39+3360*0.57)
    π*0.375^2/4*1.14
    π*0.75^2/4*1.14
    -2√(2×9.81×0.004×0.375)×log(10,((0.0006/(3.7×0.375)+(2.5×1.14×10^(-6))/(0.375×√(2×9.81×0.004×0.375)))
    -2√(2×9.81×0.004×0.3)×log(10,((0.0006/(3.7×0.3)+(2.5×1.14×10^(-6))/(0.3×√(2×9.81×0.004×0.3)))
    -2√(2×9.81×0.005×0.225 )×log(10,((0.0006/(3.7×0.225)+(2.5×1.14×10^(-6))/(0.225×√(2×9.81×0.005×0.225)))
    -2√(2×9.81×0.004×0.225 )×log(10,((0.0006/(3.7×0.225)+(2.5×1.14×10^(-6))/(0.225×√(2×9.81×0.004×0.225)))
    log(10,10)
    log(10)^10
    3*10-4*6.28*1.723*24.992*9.8/3.143
    39.62+273.15
    39.62*273.15
    1.6/5.096361
    2*3.1415926*7.3/9

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