A envelop weight 8.5 gm,if 820 of these envelop are sent with an advertisement mail. How much wieght?  Choose the correct choice from the following answers
A) 6.6 kg B) 6.8 kg C) 6.7 kg D) 6.97 kg E) 7.8 kg

Rationale: "820 * 8.5 6970.0 gm 6.97 kg answer : d"
Answer: D