A8. A cozy house is divided into 6 equally large apartments. Each apartment has a bathroom that is $3 \mathrm{~m}$ long and $2 \mathrm{~m}$ wide, which represents exactly $20 \%$ of the apartment's area. With which calculation do we get the area of the entire house in square meters?
(A) $6 \cdot \frac{1}{5}$
(B) $\frac{1}{5}$ of 36
(C) $12 \cdot 5$
(D) $12 \cdot \frac{1}{5}$
(E) $30 \cdot 6$
A8. The area of the coal shed is $6 \mathrm{~m}^{2}$, which represents $20 \%=\frac{1}{5}$ of the area of one apartment. The apartment has an area of $6 \cdot 5=30 \mathrm{~m}^{2}, 6$ apartments then have $30 \cdot 6 \mathrm{~m}^{2}$.