115 x 0.952
= (100 + 10 + 5 ) x ( 9/10 + 5/100 + 2/1000 )
= 100 x ( 9/10 + 5/100 + 2/1000 )
+ 10 x ( 9/10 + 5/100 + 2/1000 )
+ 5 x ( 9/10 + 5/100 + 2/1000 )
= 900/10 + 500/100 + 200/1000
+ 90/10 + 50/100 + 20/1000
+ 45/10 + 25/100 + 10/1000
= 900/10 + 90/10 + 45/10
+ 500/100 + 50/100 + 25/100
+ 200/1000 + 20/1000 + 10/1000
= 1035/10 + 575/100 + 230/1000
= 103.500 + 5.750 + 0.230
= 103.000 + 0.500 + 5.000 + 0.750 + 0.230
= 108.500 + 0.750 + 0.230
= 108.500 + 0.500 + 0.250 + 0.200 + 0.030
= 109.000 + 0.450 + 0.030
= 109.480
= 109.48