1 3 2 4 5 7 6
(305 * 380 - 18512 : 89) : 12 * 100 - 847 * 407 = 619371
1) 305
× 380
_______________
2440
+ 915
________________
115900
2) 18512 | 89
- 178 208
------------
712
- 712
---------------
0
3) 115900
- 208
------------
115692
4) 115692 | 12
- 108 9641
------------
76
- 72
------------
49
- 48
--------------
12
- 12
----------------
0
5) 9641
× 100
----------------------
964100
6) 847
× 407
---------------
5929
+3388
--------------
344729
7) 964100
- 344729
--------------------
619371