One longan fruit weighs 17.8 gram

I brought my longan fruit to my laboratory today just to check the weight of the fruit and it weighs 17.8 gram. That means 56 fruits make 1 kilogram. My longan tree has had 15 fruits in total when I bought it or equivalent to 267 gram, slightly more than a quarter of kilogram. I will keep a record and see how much I can get for the next session.