(25°53′)*3+(107°43′)/5
=(25+53/60°)*3+(107+43/60°)/5
=(25.88333°)*3+(107.716667°)/5
=77.65°+21.54333°
=99.19333°
=99°0.19333*60′
=99°11.5988′
=99°11′0.5988*60"
=99°11′36"