Вычислите \({-\frac{54x^6y^9}{z^{12}}\cdot}{(-\frac{z^{20}}{12x^4y^{15}})}\)

• \(\frac{9x^2z^8}{2b^6}\)
• \(\frac{9b^6}{2x^2z^8}\)
• \(-\frac{9b^6}{2x^2z^8}\)
• \(-\frac{9x^2z^8}{2b^6}\)