Melody

Next time please add the explanation of why you think whatever you think. 

(I mean right from the beginning)

People like feedback.

If you think an answer is not right, or you have doubts, you should explain what those doubts are.

I will assume that all 6 children sit side by side in one row.

Hint:

Seat the girls first. 2 girls four places

then seat the boys next.

Now asker, what do you think you should do?

I think the translation should be 'perfect number'

Perfect number,

a positive integer that is equal to the sum of its proper divisors.

The smallest perfect number is 6, which is the sum of 1, 2, and 3. Other perfect numbers are 28, 496, and 8,128.

(copied from Google)

Yes that is what you wrote.

You said that you did it by shoelace method. Which was wrong.

You did not say that you knew how to do it in any other way whatsoever. Nor did you say you knew of any other answer. Nor did you say you needed or even wanted it done by this shoelace method your yours.

I assumed you were a 10 year old who was only just learning about areas.

So you were extremely clear. You clearly asked for something you did not need or want.

As it turns out you were also clearly too lazy to check your answer for yourself, which you say you could have done easily.