I know it's solved, but found this interesting enough to share:
data _null_;
set dataset2;
array nums {*} _numeric_;
call execute ('data want; set dataset1;');
do k=1 to dim(nums);
formula = cats(vname(nums{k}), '=' , vname(nums{k}), '*', nums{k}, ';' ) ;
call execute(formula);
end;
call execute('run;');
run;
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