I understand the meaning behind Division fundamentally, such as one Magnitude being proportional to another. For example, v=m/s means meters per second. Or as a ratio, it means for every one second there is one meter. What I can't seem to wrap my brain around is the concept of multiplying different types of Magnitudes together. Take for example Amp Hours (Ah) or A*h. What is the significance or meaning behind this? It is not a ratio, and have trouble understanding the meaning behind different types of units being multiplied together as opposed to one being divided by the other.