This is the 448th most frequent Lithuanian word.
kiekį
"Amount" or "quantity."
The word 'kiekį' here is the accusative form of 'kiekis', meaning 'quantity', and it functions as the direct object of the verb 'nusipirkome' (we purchased).
Nusipirkome pakankamą produktų kiekį savaitės maistui.
We purchased a sufficient quantity of products for a week's food.
In this sentence, 'kiekius' is the plural accusative form of 'kiekis', referring to multiple quantities, and it's used as the direct object of the verb 'apskaičiuoti' (to calculate).
Matematikoje reikia apskaičiuoti kiekius įvairiose lygtėse.
In mathematics, it's necessary to calculate quantities in various equations.
The word 'kiekis' is in its nominative singular form, meaning 'amount' or 'quantity', and it serves as the subject of the sentence.