what is the unit digit in ( 4137 ) 754 ?
"explanation : unit digit in ( 4137 ) 754 = unit digit in { [ ( 4137 ) 4 ] 188 x ( 4137 ) 2 } = unit digit in { 292915317923361 x 17114769 } = ( 1 x 9 ) = 9 c"
reminder(power(4137, const_2), const_10)