524×10 = 5240
6025×10 = 60250
15862×10 = 158620
280×100 = 28000
1705×100 = 170500
3471×100 = 347100
51×1000 = 51000
273×1000 = 273000
305×1000 = 305000
(7196-6983)×1000 = 213×1000 = 213000
100×(87301-85735) = 1566×100 = 156600
(34×1000)-(7839+12570) = 34000-20409=13591
(900901-875312)+(975×100) = 25589+97500 = 123089