Andrew,
thanks for caring!

Seeing your fix 2a3bc6eb2e13 I believe it does not fully resolv the issue.
Now the code reads
 "return x // y"
  "multicall.divide(7,3)"
and the client prints
 "7/3=2"

I think you probably should change "7/3=" to "7//3=" in the client code as well
to be instructive to learners.

By the way: your change also introduced whitespace around the operator. Now it is the only one out of the four. I guess they should be consistent.