Drept linie de fractie am sa folosesc /
(2/7)^18:[(2/7)^7]^2×[(2/7)^3]^5:2/7=
=2/7^18:(2/7^7×^2×2/7^3×^5:2/7=
=2/7^18:2/7^14×2/7^15:2/7=
=2/7^18-^14+^15-^1=
=2/7^18=
=3,5^18
