Convert 3214five to base ten

Answer 1

I think the questioner means to say that the (3214) is written in base-5, and he wants the same quantity in base-10.

(3214)5 = 3 x (53) + 2 x (52) + 1 x (51) + 4 x (50)

= 3 x (125) + 2 x (25) + 1 x (5) + 4 x (1)

= (375) + (50) + (5) + (4) = 434