9.42*10-94.2*0.9
=94.2-94.2*0.9
=94.2*(1-0.9)
=94.2*0.1
=9.42
3.61/(7.2-5.3)*25
=3.61/1.9*25
=1.9*25
=(2-0.1)*25
=2*25-0.1*25
=50-2.5
=47.5
9.42*10-94.2*0.9
=94.2-94.2*0.9
=94.2*(1-0.9)
=94.2*0.1
=9.42
3.61/(7.2-5.3)*25
=3.61/1.9*25
=1.9*25
=(2-0.1)*25
=2*25-0.1*25
=50-2.5
=47.5