CREATE TABLE table_64810 ("Class" CLOB, "Railway number ( s ) " CLOB, "DRG number ( s ) " CLOB, "Quantity" FLOAT, "Year ( s )  of manufacture" CLOB, "Axle arrangement  (  UIC  )  Bauart" CLOB)

Which railway number has 3 quantity?
SELECT "Railway number(s)" FROM table_64810 WHERE "Quantity" = '3'
SELECT "Railway number(s)" FROM "table_64810" WHERE "Quantity" = '3'