Pls help me find the circumference of a circle with radius of 28ft. let π=22/7

See below ~
Here , it is given that the radius of a circle is 28 ft and we've to find it's circumference .
So,
Formula :
[tex] \sf \: C = 2πr \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: [ \red{ π = \frac{22}{7}} ][/tex]
Now ,
[tex] \Longrightarrow \sf {C = 2*π*r }[/tex]
[tex] \: \: \: \: \: \: \: \: \: \: \: \: [/tex]
[tex]\Longrightarrow \sf{C = 2* \frac{22}{ \cancel7} * \cancel{28}}[/tex]
[tex] \: \: \: \: \: \: \: \: \: \: \: \: [/tex]
[tex]\Longrightarrow \sf{C = 2* 22 * 4} [/tex]
[tex]\: \: \: \: \: \: \: \: \: \: \: \:[/tex]
[tex]\Longrightarrow \sf{C = 44 * 4} [/tex]
[tex]\: \: \: \: \: \: \: \: \: \: \: \:[/tex]
[tex]\Longrightarrow \sf{C = 176} [/tex]
Therefore , the circumference of circle is 176 ft .