= 2000ДМ3 + 200М3 * 200СМ3 + 2000СМ3
= 2000ДМ3 + 40000СМ3 + 2000СМ3
= 2000ДМ3 + 42000СМ3

Therefore, the total volume is 2000ДМ3 + 42000СМ3.