90000-90000*0.1=81000
81000-81000*0.1=72900
72900-72900*0.1=65610
65610-65610*0.1=59049
59049+59049*0.1=64953.9
64953.9+64953.9*0.1=71449.29
71449.29+71449.29*0.1=78594.22
78594.22+78594.22*0.1=86453.64
86453.64+86453.64*0.1=95099
100000-95099=4901