15/53.08
    17/55.7
    0.017/55.7
    94.9/9800
    92.8/9800
    95.8/9800
    96.5/9800
    162.3/9800
    162.3/9.8
    18.8/96.5
     (π*47.4^2*18.5)/4
     (π*47.4^2*18.1)/4
     (π*47.5^2*19)/4
    （π*47.4^2*18.8）/4
    （π*50.6^2*27.7）/4
    arcsin(2)
    arcsin(0)
    arcsin(1)
    !(2.7)
    tan1.5707963267948966192313216916398

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