(9,68-0,77:15,4+15,4+0,87)*4,2
(9.68-0.77:15.4+15.4+0.87)*4.2=108.78
1)0.77:15.4=0.05
2)9.68-0.05=9.63
3)9.63+15.4=25.03
4)25.03+0.87=25.9
5)25.9*4.2=108.78