Because this semester will be end, I have to prepare some reports these days. My classmates and I did our report of computer's formula yesterday. Although we know this time's report is not easy to finish and we also face some difficulities when we do our formula, we still demand ourselves that we should try our best and make our efforts to finish this time's report. If we suffer some problems, we are bound to consult teacher to teach us. Although we do not finish our report, I believe as long as we continue to work hard, we must be able to finish our report. I hope this time's report that we can let teacher satisfy and attain teacher's standard.