10) 5 ⋅ 231 ⋅ 25 ⋅ 20 ⋅ 4 = 231 ⋅ 5 ⋅ 20 ⋅ 25 ⋅ 4 = 231 ⋅ 100 ⋅ 100 = 231 ⋅ 10000 = 2310000
Ответ: 2310000