We all make mistakes, as the Dalek said climbing off the dustbin.

FWiW .. here's mine (or is it?)

One Tsar Bomba ~ 50 megatonne. One Hiroshima bomb ~ 15 kilotonne.

One Tsar Bomba ~ 50,000 / 15 ~ 3,333 Hiroshima bombs.

1,040 x Tsar Bomba ~ 3,466,667 Hiroshima bombs.

Oops.

Every time I see your username I can’t help but say it in my mind as Defrost Kelly, some kind of frozen Dr. Leonard "Bones" McCoy