You can. But you probably do not want to.
Schuko is fused at max 16A, so you can never pull more than 3.2kW over a Schuko plug. I do not know the electric code in Finland, so it may not be legal to connect machines that can draw a larger current to a Schuko as well.
To use your 7kW cooking top, you will need a 32A circuit breaker if the top is single phase. This means rewiring with thicker wire and replacing the outlet with a different type that can handle 32A.
To wire it (temporarily), you can go to a store that sells electric products, such as Biltema. What you're looking for is a schuko plug. Biltema is just an example, as I know they are present in Finland, and the article numbers are the same as in Norway, so it is easy for me to link. Connect the blue and brown wire to the prongs, and the yellow/green to the earth symbol.
This should only be regarded as temporary fix, until you can get an electrician to update your installation.