Ответ:
12.3*0.8=9.84
5.4*1.6=8.64
9.84-8.64=0.2
46-34.17=11.83
11.83*0.09=1,0647
3,126-1,7=1,426
0,15+7,4=7,55
7,55*1,426=10,7663