How to connect a switch and a router to the same network?

Question

network hardware

The situation is such that there is a switch (unmanaged) and the tp link router is the simplest. How to set up so that all users are on the same network. 4 users are directly connected to the switch. The router is connected to the switch and there are 3 users on the router. It is necessary to make sure that 4 and 3 users are on the same network and see each other. I am attaching the scheme

Answer 1

Everything should work out of the box (as written above), do you accidentally connect the switch to the wan connector of the router?
In which subnet do computers work through a router and through a switch?

Answer 2

Nothing is needed, everything will work out of the box.

Answer 3

If your router is connected to the switch by a LAN port, it should work like that. If this is not possible, add all the necessary ports to the bridge.