declare 
a number:=16; 
b number:=10; 
c number; 
d number; 
e float; 
f number; 
begin 
c:=a+b; 
d:=a-b; 
e:=a/b; 
f:=a*b; 
dbms_output.put_line('the value of Addition is:' || c ); 
dbms_output.put_line('The value of Substraction is:' || d); 
dbms_output.put_line('The value of Division is:' || e); 
dbms_output.put_line('The value of Multiplication is:' || f); 
end;