Find smallest and largest 4 digit number.
Can apply unitary method
Product of largest 3 and 4 digit number
Multiply the numbers
First find out total minutes in 1 day
In large numbers, first the one's digit of the bottom number should be multiplied with the top number. Then put a 0 below the one's column. Continue multiplying other digits of the bottom number with the top one.
use long multiplication
Unitary method will be helpful to find out the answer.
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