"Okay. Perfect. Now here is where it gets kind of fun. Do you know what different bases are, when it comes to numbers? Magic for repairs is mostly done octally- base eight, for reasons that are too complicated to get into. Here-"
Sliding back to the chalkboard, getting a new piece of chalk, then writing out in one column;
"So normally we count like this, 0 1 2 3 4 5 6 7 8 9 10. In base eight, you throw out the numbers eight and nine, so it looks like this; 0 1 2 3 4 5 6 7 0o10 0o11 0o12. So the number we're working with is ten, which would be-"
no subject
Sliding back to the chalkboard, getting a new piece of chalk, then writing out in one column;
"So normally we count like this, 0 1 2 3 4 5 6 7 8 9 10. In base eight, you throw out the numbers eight and nine, so it looks like this; 0 1 2 3 4 5 6 7 0o10 0o11 0o12. So the number we're working with is ten, which would be-"
Underlining 0o12 with the chalk.
"-still with me?"