One cement tank using 1 sq.m. and provides 1 kilogram of paddy

Growing rice in 10tanks using 10 sq.m.

We’ll get 10 kilograms of paddy

 

If We grow  4 times a year we’ll get 40 kilograms of paddy ,after milling we’ll get 25 kilograms of rice

Which is 40% of the consumption of one person in one year