“What do you get if you divide 22 sheep with 7 collies.”/“Shepherd’s pi.”

The number π (pi) is approximately 22/7. A riddle was posted on Twitter by Graeme McKendry (and others) on March 8, 2012:
 
Q: What do you get if you divide 22 sheep with 7 collies?
A: Shepherd’s pi.
   
“Shepherd’s pi” is a joke on “shepherd’s pie.” Another version of the riddle was posted on Twitter by Tim Clarke on July 29, 2019:
   
Q: What do you get if you divide 22 sheep into 7 pens?
A: A shepherd’s pi.
 
 
Wikipedia: Pi
The number π (/paɪ/) is a mathematical constant. Originally defined as the ratio of a circle’s circumference to its diameter, it now has various equivalent definitions and appears in many formulas in all areas of mathematics and physics. It is approximately equal to 3.14159. It has been represented by the Greek letter “π” since the mid-18th century, though it is also sometimes spelled out as “pi”. It is also called Archimedes’ constant.
 
Wikipedia: Shepherd’s pie
Shepherd’s pie (lamb) or cottage pie (ground/minced beef) is a meat pie with a crust or topping of mashed potato.
     
Twitter
Graeme McKendry
@VicarageRoader
Q: What do you get if you divide 22 sheep with 7 collies? A: Shepherd’s pi
9:53 AM · Mar 8, 2012·Twitter Web Client
   
Twitter
Alex Giles 💬
@Muldwych
Q: What do you get if you divide 22 sheep with 7 collies?
A: Shepherd’s pi
Im here all week 😉
11:13 AM · Mar 8, 2012·Twitter Web Client
   
Twitter
Gordon Horne
@Horne_of_Gondor
Q: What do you get if you divide 22 sheep with 7 collies?
A: Shepherd’s pi
11:33 AM · Mar 8, 2012·Twitter Web Client
     
Twitter
Alex Giles 💬
@Muldwych
Q: What do you get if you divide 22 sheep with 7 collies?
A: Shepherd’s pi
Im here all week 😂😃
10:35 AM · Mar 8, 2017·Twitter for iPhone
 
Twitter
Shane O’Connor
@muscles5781
What do you get if you divide 22 sheep with 7 collies?
Shepherd’s Pi
#punbelievable
#baaaaadjoke
#sheepish
3:30 PM · Mar 8, 2018 from Cork, Ireland·Twitter for Android
 
Twitter
Tim Clarke
@timbo_clarke
What do you get if you divide 22 sheep into 7 pens?
A shepherd’s pi.
3:43 AM · Jul 29, 2019·Facebook
 
Twitter
🤣 The Dad Joke Man 😉
@DadJokeMan
What do you get if you divide 22 sheep into 7 pens?
A shepherd’s pi…
#mondaymirth
3:22 PM · Jul 29, 2019·Twitter for iPhone