1) 20 200 - 19 292 = 908
2) 908 ⋅ 7050 = 639 140
3) 639 140 : 9400 = 67,9936
4) 9080 : 40 = 227
5) 67,9936 : 227 = 0,2995
6) 0,2995 ⋅ 5097 = 1526,536
7) 77 949 + 1526,536 = 79475,536
Ответ: 79475,536