CREATE TABLE T1 (
    ID          NUMBER,
    PRODUCT     VARCHAR2(50),
    PRICE       NUMBER(10, 2),
    TAXED_PRICE NUMBER(10, 2) GENERATED ALWAYS AS (round(PRICE * 1.2, 2)) VIRTUAL
);
INSERT INTO T1 (ID, PRODUCT, PRICE) VALUES (1, 'Spoon', 12);