Can you convert a stackable dryer 220v to 110v? I don't have 4 prong outlet. Need to be 3 prong regular plug for regular outlet.
No. A 220 V to 240 V clothes dryer cannot be modified to operate on 120 V only.
There are very small clothes dryers that operate on 110 V, but they are so small that it is clear that a standard 240 V clothes dryer requires much more power than could be supplied by a 120 V 20 A circuit. Magic Chef 2.6 Cu Ft clothes dryer
It can be done, but it is wizard tier work. You are relying on the fact that most of the interior equipment runs on 120V and only the heater needs 240V. You also feed the heating element on 110V, which that it runs at half the amperage (around 10A) making it output 1/4 the heat. This makes it dry clothes verrrrry slowly.
The simple fact is that those familiar AC outlets are not magic, and simply cannot provide unlimited amounts of power. Appliances that plug into 120V outlets are very limited in how much heat they can make. That is why powerful heaters use 240V.
You are better off selling the unit on Craigslist and buying a gas unit on Craigslist.