Упростите выражение \(\frac{7ab^2}{40c^4}\cdot5ac\)

• \(\frac{7a^2b^2}{8c^3}\)
• \(\frac{7b^2}{200c^5}\)
• \(\frac{7b^2}{200c^3}\)
• \(\frac{7ab^2}{8c^5}\)