Feature request: Allow targetting a set number of factories instead of items per second

[tivec]

When setting up a produciton, we are currently limited to items per time, but it would be great having a way to choose "I want 50 factories producing" and get the calculations for the intermediates.

[Helfima]

hello, yes I want do the same feature than Helmod for Factorio
calculation by factories is a feature :)