(1000000-936*180):20=41576
936*180=168480
1000000-168480=831520
831520:20=41576
936 1000000 831520 I 20
*180 - 168480 - 80 I---------
-------- ------------------ ------------- I 41576
000 831520 31
+ 7488 - 20
+ 936 ---------
-------------- 115
168480 -100
-------------
152
- 140
-----------
120
-120
--------
=0=