702*2849002849
    738*27100271
    1314*152207
    657*152207
    242273*2522407
    419*2917
    1/263
    1/7
    1/77
    1/539
    1/539
    239*9298
    239*41841
    arccos0.5
    80/（1+10%）/950.25+80/（1+10%）^2/950.25+1080/（1+10%）^3/950.25
    arccos0.5
    695*2.6/1.3*1.43
    745*2.7/1.3*1.1
    760*2.2/1.3
    763*2.12/1.3

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