Which nation completed its external debt reporting in 1980 and had a Land under cereal production value of 3018500?
completed its external debt reporting refers to ExternalDebtReportingStatus = 'Actual'; in 1980 refers to year = 1980; Land under cereal production value of 3018500 refers to value = 3018500
SELECT T2.CountryCode FROM Indicators AS T1 INNER JOIN Country AS T2 ON T1.CountryCode = T2.CountryCode WHERE T1.IndicatorName LIKE 'Land under cereal production%' AND T1.Value = 3018500 AND T1.Year = 1980 AND T2.ExternalDebtReportingStatus = 'Actual'