$28 \cdot 7$ The value of the fraction $\frac{(487000)(12027300)+(9621001)(487000)}{(19367)(0.05)}$ is closest to
(A) 10000000 .
(B) 100000000 .
(C) 1000000000 .
(D) 10000000000 .
(E) 100000000000 .
(7th American Junior High School Mathematics Examination, 1991)
[Solution] First, look at the denominator: $19367 \cdot 0.05 \approx 1000$, and
$$
\begin{aligned}
\text { Numerator } & =487000 \cdot(12027300+9621001) \\
& \approx 487 \cdot 1000 \cdot 21600000, \\
\therefore \quad \text { Original expression } & \approx 487 \cdot 21600000 \approx 10000000000 .
\end{aligned}
$$

Therefore, the answer is $(D)$.