Moon’s radius = r = 1738 km
Moon’s surface area = 4*pi*r^2 = 3.8e7 km^2
The size of the area to 每年提取氦3 = 3.8e7 km^2 / 10,000 = 3800 km^2 = 61.6 km * 61.6 km
Therefore, to get 约一百吨左右的氦3 one needs to turn the whole square of 62 km by 62 km (with, say, at least 30 km of thickness) upside down. I think the energy cost to do so on the Moon is at least 1,000,000 times greater than the energy one can get from those 氦3。