data random;
y=round(16454.6582,2);

y1=round(16454.6582,3);

y2=round(16454.6582,4);

z=Round(645465.3333333,2);

z2=log10(100);
proc print;
run;

answer:

   16454   16454 16454  645466     2   !!!!  ROUND()??