CREATE TABLE table_204_124 (id NUMBER, "no." NUMBER, "name" CLOB, "public access" NUMBER, "location & map links" CLOB, "area\ ha" NUMBER, "area\ acres" NUMBER, "references" CLOB)

what is the acreage difference between madingley wood and hayley wood ?
SELECT ABS((SELECT "area\nacres" FROM table_204_124 WHERE "name" = 'madingley wood') - (SELECT "area\nacres" FROM table_204_124 WHERE "name" = 'hayley wood'))
SELECT ABS((SELECT "area\nacres" FROM "table_204_124" WHERE "name" = 'madingley wood') - (SELECT "area\nacres" FROM "table_204_124" WHERE "name" = 'hayley wood'))