CREATE TABLE table_53158 ("Year" FLOAT, "Numer of Jamaicans granted British citizenship" FLOAT, "Naturalisation by residence" FLOAT, "Naturalisation by marriage" FLOAT, "Registration of a minor child" FLOAT, "Registration by other means" FLOAT)

Tell me the sum of number of jamaicans given british citizenship for 2004 and registration of a minor child more than 640
SELECT SUM("Numer of Jamaicans granted British citizenship") FROM table_53158 WHERE "Year" = '2004' AND "Registration of a minor child" > '640'
SELECT SUM("Numer of Jamaicans granted British citizenship") FROM "table_53158" WHERE "Registration of a minor child" > '640' AND "Year" = '2004'