huh? 14 % 2 is not 2. izdwuut is right, it does not matter in this case.

Thank you Ivan, I fixed the image

Oh, I found this image. They changed domain to postimg.cc.
So, here is link: https://postimg.cc/image/rbgnncxkb/

I don't have this image in my browser cache( Probably somebody can share this image and I will upload this again, otherwise it will take some time while I will restore the image.
Guys, could you check you browser cache?

The example image (http://s33.postimg.org/nf3brdckv/111.png) is not exists – 404 error.

1^2 + 2^2 + 3^2 = 14 : (14 % 2) == 2
1^3 + 2^3 + 3^3 = 36 : (36 % 2) == 0
It metters...

You right. The problem is in solution :) Thanks!

This is not an issue with the Tests. Please recheck your code!
This is the test you mentioned cr_assert_str_eq(multiply("0000001", "3"), "3"); and has you can see, it expect "3" as your answer.

I have a problem with test "0000001" and "3". The message is

The expression (as strings) (multiply("0000001", "3")) == ("3") is false.

But I rechecked and my program returns exactly "3" string. I even compared it using strcmp and got (int) 0 as result.
I'm training C version of this kata.

strcmp(multiply("0000001", "3"), "3") == 0

It couldn't, but it doesn't matter here, as it seems.