Pinging between 2 PC’s? [on hold]

I have the following setup:

Home Router IP address: "192.168.0.1", PC1: "10.1.2.2", PC2: "10.1.2.3"

I ran ipconfig on both PC's to make sure they have the assigned ip address which they do.

Why am I still able to ping between PC 1 and PC2 even though router is on different network?

I'm just starting out maybe I'm doing something wrong?