347*18+2007/9=6246+233=6469
347*(18+2007)/9=347*2025/9=347*225=78075
(347*18+2007)/9=(6246+2007)/9=8253/9=917
209*37-28*102+3424/8=7733-2856+428=5305
209*((37-28)*102+3424)/8=209*(9*3526)/8=209*31734/8=829050,75
(209*37)-(28*102+3424)/8=7733-(2856+3424)/8=7733-785=6948