将Excel中公式变为sas code

将Excel中公式变为sas code ，感谢帮忙

=6371004*ACOS(1-(POWER((SIN((90-C2)*PI()/180)*COS(B2*PI()/180)-SIN((90-C3)*PI()/180)*COS(B3*PI()/180)),2)+POWER((SIN((90-C2)*PI()/180)*SIN(B2*PI()/180)-SIN((90-C3)*PI()/180)*SIN(B3*PI()/180)),2)+POWER((COS((90-C2)*PI()/180)-COS((90-C3)*PI()/180)),2))/2)

Acos(x)=arcos(x)
cos(x)=cos(x)
sin(x)=sin(x)
PI()=constant('pi')
power(n,m)=n**m