what is smallest number in fleet for chassis manufacturer Scania and fleet numbers is 3230?
CREATE TABLE "table1_1425948_1" (
  "chassis_manufacturer" text,
  "chassis_model" text,
  "body_model" text,
  "number_in_fleet" real,
  "fleet_numbers" text
);
SELECT MIN("number_in_fleet") FROM "table1_1425948_1" WHERE "chassis_manufacturer"='Scania' AND "fleet_numbers"='3230';