please help me i will mark brilient

[tex] \red{20 \: \frac{1}{4} \div 9}[/tex]
[tex] = \frac{81}{4} \div 9[/tex]
[tex] = \frac{^{9}\cancel{81}}{4} \times \frac{1}{\cancel{9}^{1} } [/tex]
[tex] = \frac{9}{4} [/tex]
[tex] \blue{ = \boxed{2 \: \frac{1}{4} }}[/tex]
2 ¼ m is the length of each piece of the rope
Hope it helps