6ab....x (barat)= 4·(abc....x6)barat
6·10ⁿ + abc...x = 4ₓ(10ₓabc..x +6) n = nr. cifre ale abc....x (barat)
39ₓabc...x = 60...de n ori...0 -24
39ₓabc....x = 59.....976 ⇒⇒ 39 | 599....976 39 | 599976 ⇒⇒
⇒⇒ 599976 = 6·10⁵ - 24 ⇒⇒ nr. = 6abcde
39·abcde = 599976 abcde = 15384
615384 = 4·153846
