system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does combustion engines need multigeared transmission while electrical engines can make due with a single gear?

So trying to figure out why electrical engine only needs a single gear while a combustion engines needs multiple gears. Cant wrap my head around it for some reason

EDIT: Thanks for all the explanation, but now another question popped up in my head. Would there ever be a point of having a manual electric car? I've heard rumors of Toyota registering a patent for a system which would mimic a manual transmission, but through all this conversation I assume there's really no point?
gpt
A combustion engine only works in a fairly narrow range of rpm. They usually need at least 1000rpm to be able to generate enough power to propel a car. 

The reason is that piston movement is directly proportional to rpm, and you can only fit a certain amount fuel+oxygen in each cylinder. So the amount of fuel you can burn, and the amount of power you generate is limited by rpm. There are ways to push that limit (e.g. by compressing and cramming more fuel+oxygen in), but that only goes so far. For more power, your engine needs to turn faster.

An electrical engine does not have that limit. You can supply more or less as much current as you want (until your wires start melting), regardless of whether the engine is turning or not.

So electrical engines work at lower rpm.

It also goes into the other direction though. Electrical engines have far less moving parts (no piston, valves, no mechanisms that convert piston movement to rotation, ...), and thus can potentially work at higher rpm before falling apart.