what is the unit digit in 7 ^ 105
"explanation : unit digit in 7 ^ 105 = unit digit in [ ( 7 ^ 4 ) 26 x 7 ] but , unit digit in ( 7 ^ 4 ) 26 = 1 unit digit in 7105 = ( 1 x 7 ) = 7 a"
reminder(power(7, const_2), const_10)