An AMD chip uses $4$ clock cycles to conduct one multiplication, $4$ clock cycles to

conduct one addition, $4$ clock cycles to conduct one subtraction and $16$ clock cycles to

conduct one division. The computer uses a $2\mathrm{.}5$ GHz processor. The computational times

are given for various steps of Na$$ve Gauss elimination and LU decomposition methods of

solving simultaneous linear equations as below.