CREATE TABLE table_60437 ("Symbol" CLOB, "Prefix" CLOB, "SI Meaning" CLOB, "Binary meaning" CLOB, "Size difference" CLOB)

What is the size difference for exa?
SELECT "Size difference" FROM table_60437 WHERE "Prefix" = 'exa'
SELECT "Size difference" FROM "table_60437" WHERE "Prefix" = 'exa'