Every belt has a maximum item speed. If you feed a multiplier two belts running at full capacity, the output belt will clog if it cannot handle the combined rate of the new numbers. Always use splitters and mergers to balance your lines, ensuring your mathematical operators never sit idle due to a traffic jam. Utilize Mathematical Shortcuts
The gameplay loop of Beltmatic is simple to learn but exceptionally deep to master.
The Ultimate Guide to Beltmatic: The Math-Based Factory Game Captivating Steam