積

(1)a quantity obtained by multiplication; "the product of 2 and 3 is 6"

(2)かけ算で得られる数値

(3)the set of elements common to two or more sets; "the set of red hats is the intersection of the set of hats and the set of red things"

(4)2つ以上の集合に共通する要素の集合

(1)