whats the logic behind this question
Broken calculator
@Learning_bunny here you have to calculate factorial of number but answer fro factorial can be store in variable as it is large,so to find factorial of large number you have to take array to store factorial of number and have to update result array to store multiplication result.Now the factorial of 100 is 1009998… so you have to use school multiplication and upodate result array everytime.Hope you get it ,just apply multiplication logic and store result in array.Feel free to ask any doubt 
is this like we take a array of max size and each at index of array a digit of the multiplication is stored and array is updated after every multiplication
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