CREATE TABLE table_203_875 (id NUMBER, "#" NUMBER, "name" CLOB, "birth and death" CLOB, "office started" CLOB, "office ended" CLOB)

how long was geir vidalin in office ?
SELECT "office ended" - "office started" FROM table_203_875 WHERE "name" = 'geir vidalin'
SELECT "office ended" - "office started" FROM "table_203_875" WHERE "name" = 'geir vidalin'