I keep a journal in a text file and do what I call “watneying” after Mark Watney of The Martian. Looks a bit like this:

80 rubber plants (4 gangs of 20) will produce 1600 HOR/min. The turbo blend fuel recipe takes HOR, Fuel and Coke, plus sulfur. 15 fuel, 30 HOR and 22.5 coke/min. Need to figure up the fuel and coke in terms of HOR/min

Diluted fuel takes 50 HOR/min and makes 100 fuel/min.

Petrol coke takes 40 HOR/min and makes 120 coke/min.

So we’re talking about 30 raw HOR, 7.5 fuel HOR and 7.5 coke HOR/min. So 45 HOR/min plus some sulfur becomes 45 turbofuel/min.

My play time counter in this game is wildly inaccurate because I spend about as much time looking at the map, wiki and planning in my text document as I do in-engine building factories and shooting piggies.