In Arithmetic, multiplication operation involves two or more numbers and multiplication operator i.e (×)
When one number(10) is multiplied with another(20), it is indicated in following ways
10 × 20.
(10)(20)
10(20)

For Example = Show multiplication operation on the following pair of numbers.
(5, 3) = 5 × 3
(11, 111, 9) = 1 × 111 × 9
(2, 33) = (2)33
(100, 12) = (100)(12)

In algebra, multiplication operation involves two or more literal numbers and multiplication operator i.e (×)
When one literal number(b) is multiplied with another literal number (r), it is indicated in following ways
br
b × r
(b)(r)
(b)r
b.r

For Example = Show multiplication operation on the following pair of literal numbers.
(p, q) = pq
(g, h) = g ×h
(x, y, z) = (x)y
(p, q, r, s) = p.q.r.s
(ab) = a × b