6. (10 points) An Englishman was the owner of a plot of land in Russia. He knows that, in the units familiar to him, the size of his plot is three acres. The cost of the land is 250000 rubles per hectare. It is known that 1 acre $=4840$ square yards, 1 yard $=0.9144$ meters, 1 hectare $=10000 m^{2}$. Calculate how much the Englishman will receive as a result of the sale.
Answer: approximately 303514 rubles

Solution. 1 square yard $=0.9144 \cdot 0.9144=0.83612736 \mu^{2}$,

3 acres $=3 \cdot 4840=14520$ square yards $a=14520 \cdot 0.83612739=12140.57 \mu^{2}$ (2 points), 12140.57 $\mu^{2}=\frac{12140.57 \mu^{2}}{10000} \approx 1.214057 ~ 2 a$,

$$
1.214057 \cdot 250000=303514.25 \text { rubles }
$$