Answer :

36 divided by 4 = ?
Multiples of 4: 4,8,12,16,20,24,28,32,36
How many times did we count by 4?
We counted by 4, nine times so:
36 divided by 4 = 9
Or just to check your work just multiply:
9 x 4 = 36
81 divided by 9 = ?
Multiples of 9: 9,18,27,36,45,54,63,72,81
How many times did we count by 9?
We counted by 9, nine times so:
81 divided by 9 = 9
Or to check our work just multiply:
9 x 9 = 81

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