solar energy reaching earth’s surface

At one point, solar energy per unit area reaching the Earth's surface is 200?
At one point, solar energy per unit area reaches the Earth's surface is 200 W / m ^ 2, averaged over a 24 hour day. If the average power requirement at home is 3 kW and can convert solar energy into electricity with 10% efficiency, how big a collector area you need to meet your energy needs household solar power? (An adjustment of collector in your garden or on the roof? Please help. It would be greatly appreciated. Thank you so much!
A mathematician. 1 m ^ 2 of solar panels generates an average of 10% * 200 W = 20 W. An average of 3000 W, which is 150 times more, so it needs 150 m ^ 2 of solar panels. Power 3000 W average is very large for a typical house. Is there a sawmill in the interior hidden?
The Sun – Part 1/6