making two belt to average amount

[thorny cosmos]

(Like Factorio's distributor or divider i dont know exact name in English...)

When the production capacity of two belts is different,

how do I make the conveyance amount of the belts the same as dividing by 2?

(I am Korean, so there may be a mistranslation in the terminology or name).

[bronze wyvern]

youre asking for a load balancer, yes?

that is not in this game, though its also not needed if you design efficient factories