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You don't need a "model" for that; you just need to know the multiplication method taught in elementary school.
It would help to know which digit. 0 appears in 9 numbers and each of the others in 18 numbers.
they all are digit numbers
I think it's 18. 16,26,36,46,56,60,61,62,63,64,65,66,67,68,69,76,86,96. Hope it'll help you!
It is easier to simply add two one-digit numbers than to mess about with estimation!