(154800:10:9-47*6)*(97840:80+77)=1438*1300=1869400
1. 154800:10=15480
2. 15480:9=1720
3. 47*6=282
4. 1720-282=1438
5. 97840:80=1223
6. 1223+77=1300
7. 1438*1300=1869400
76000*90:1000-96:(48:8)*109-5400:600=6840-1744-9=5087
1. 76000*90=6840000
2. 6840000:1000=6840
3. 48:8=6
4. 96:6=16
5. 16*109=1744
6. 5400:600=9
7. 6840-1744=5096
8. 5096-9=5087