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(4 ----- - 1 ---- ) × ----
6 3 4
26 4 2
(---- - ---- ) × ------
6 3 4
26×3-6×4 2
(------------- ) × ---------
6×3 4
54 2
------- × -------
18 4
54×2 108 3
-------- → ---------- ⇒ --------
18×4 72 2
Rpta: 3
----
2