9180+644000:700-9098= 1002
1) 644000:700=920
2) 9180+920=10100
3) 10100-9098=1002
74830:79+320*60 = 20269
1) 74830:70=1069
2) 320*60=19200
3) 1069+19200=20269
10102+167600:80 = 12197
1) 167600:80=2095
2) 10102+1095=12197
(3000-62700:30)*321 = 292110
1) 62700:30=2090
2) 3000-2090=910
3)910*321=292110