In question 5‐ii in exercise 15.1 we can cut 579 and 2400 with the he

This question was asked in Ex 15.1, 5

In question 5‐ii in exercise 15.1 we can cut 579 and 2400 with the help of 3

Then why in teachoo it not being divided???

After dividing them we get 193 upon 800.