Should this be extracted?

extracted.clj

(defn get-number-of-rows
  [board]
  (int (java.lang.Math/sqrt (count board))))

(defn get-winner
  [board]
  (let [num-of-rows (get-number-of-rows board)
        ...

not-extracted.clj

(defn get-winner
  [board]
  (let [num-of-rows (int (java.lang.Math/sqrt (count board)))
        ...