Verified answer

210 : 2 = 105                  225 : 3 = 75                   343 : 7 = 49

105 : 3 = 35                    75 : 3 = 25                     49 : 7 = 7

35 : 5 = 7                        5 : 5 = 5                         7 : 7 = 1

7 : 7 = 1                          5 : 5 = 1                        343 = 7 * 7 * 7

210 = 2 * 3 * 5 * 7           225 = 3 * 3 * 5 * 5  

9225 : 3 = 3075                        3242 : 2 = 1621          

3075 : 3 = 1025                        1621 - простое число                            

1025 : 5 = 205                           3242 = 2 * 1621

205 : 5 = 41

41 : 41 = 1

9225 = 3 * 3 * 5 * 5 * 41 

6245 : 5 = 1249

1249 - простое число (см. таблицу простых чисел)

6245 = 5 * 1249