and smart:
I hope that the smart man, who divided 6000 rubles for 1.5 million watts (1.5 MW) and received 4 rubles, was already advised to go to the store without a calculator?

What is not so? The price of electricity is in rubles per kilowatt. We get: 1.5 million watts = 1500 kW. 6000 / 1500 = 4 rubles per kilowatt. Can you go to school and learn life?