The area of a rectangle is represented by 4w^2z^3 + 6w^4z^5 − 10w^3z^4

The width is represented by 2w^2z^3

What is the length of the rectangle?

2w^4z^6 + 3w^6z^8 − 10w^5z^7

8 + 12w^2z^2 − 20wz

2 + 3w^2z^2 − 10wz

2 + 3w^2z^2 − 5wz