This part is in a Children's math book, it teaches how to use cancellation in dividing. the sum is 270/18. 270 and 18 are both broken down to their prime factors, so it become 2x3x3x3x5/2x3x3, and the female character in the book suddenly sing "You are feeble and you know it"in the illustration nearby. What does the it mean in this context, why would she say that?
270/18 = 2x3x3x3x5/2x3x3 Now we can cancel. This means if any number on the top has a matching number on the bottom, We can cross them both out!
[Illustration] "You are feeble and you know it" (the female character sings this out, holding a scarf with both hands above her head)
We are just left with 3*5 on the top, that gives the answer 15, so 270/18 = 15