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Answer:
3024
Step-by-step explanation:
so only available numbers are 1 2 3 4 5 6 7 8 and 9
no 0 also 10 because only keypad
so the solution here is
9×8×7×6
and you get 3024
why 3024
first is 9 because we have 9 numbers
no repitition so now its 8
7
6
except the others
im just a grade 8 student and only learned this from yt
correct if im wrong