Three has opened a new go-kart track for only Threes; the first customer is Six, who needs two go-karts. Suddenly, Nine, Twelve, Sixteen, and Eighteen have came in. Since Nine is first in line, Three proceeds to subtract him by Threes. Having been done slowly, Eighteen complains about how slow Three is going, which annoys Three; during which, she stretches one of her juggling balls.
Three has no idea on how to divide faster aside from subtracting multiple times. After Twelve shows off her four columns of four, Three decides to juggle her balls, and incidentally creates a new sign- the division sign. With that done, Three divides Twelve into four Threes. Believing she's able to divide anyone with it, Sixteen has a go, only for the two of them to realize that one block will remain if she were to be divided into Threes. Four suddenly comes in, having opened his own go-kart track for Fours only. Sixteen eventually decides to use that go-kart track, since she is unable to fit into Three's go-karts.
By now, it's Eighteen's turn, but he's grown so impatient he decides to do division by himself. He soon figures out that division is the reverse of multiplication, and decides to keep dividing and multiplying himself. Seeing that he's going to do this all day, Three decides to get onto her own go-kart track.
This is the seventh episode where 1 is absent, making 3 the smallest number in this episode.
This is the fourth episode where Eighteen is the biggest number.
This is the first if not only use of the division sign. ÷
When Three tells Sixteen that she can't divide her into threes, the subtitles say that she could.
In the subtitles, in the line "16 divided into fours equals... 1, 2, 3, 4!", the subtitle "1, 2, 3, 4!" is misspelled as "1, 2, 2, 4!"