What is the population of African in 'Turks and Caicos Islands'?
African is the name of enthic groups in the country; Population of (African in Turks and Calcos Island) = (percentage of African) * (population of Turks and Calcos Island)
SELECT T2.Percentage * T1.Population FROM country AS T1 INNER JOIN ethnicGroup AS T2 ON T1.Code = T2.Country WHERE T2.Name = 'African' AND T1.Name = 'Turks and Caicos Islands'