1/2×（1.3×16＋1.5×1.0×7.5）×6.371
    1.0（1.3×1/8×16×6.367^2+1.5×1.0×1/8×7.5×6.3712^2）
    arcsin0.692
    0.0174*arcsin0.378
    0.0174*arcsin0.528
    0.0174*arcsin0.578
    arcsin0.707
    0.021*arcsin0.525
    π/180*arcsin0.578
    0.025*arcsin0.607
    arcsin0.702
    0.025*arcsin0.665
    0.0102*arcsin0.702
    cos70.1333
    cos70.51333
    0.0258*arcsin0.669
    0.0258arcsin0.669
    cos(1.52)
    0.813*sqrt（1.215*1.215-0.813*0.813）+π*1.25*1.25*arcsin0.669135802469135802
    atan(5/60/π)/120/π

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