Multiply the conjugate numbers

For example take a two digit number,
the first digit is same and the sum of the last digit of the numbers is 10.

For example 62*68
here the first digit is same 6.
the sum of the last two digits is 2+8=10.

multiply the first digit with the next digit. and put the multiplication of the last digits at the end.

62*68 = (6*7) | (2*8)
            = 4216.

Take 43 * 47 = (4*5) | (3*7)
                     = 2021

Take 81*89 = (8*9) | (1*9)
                    = 7201.