Sun Wukong appears , hmm not very good well lets see how you do with this puzzle then. I will tell you a little story of my recent travels.
Early one morning just as the sun was rising well no there was no maiden
singing but I was on my travels sitting by a lock connected to a harbour
watching the fishing fleet unload their catch for weighing . Lets just
say I was well east of Africa .
Just by my side was an old sack weighing balance

there were only 3 weights available 10kgs,20kgs & 50kgs
Near to me at the side of the canal were hundreds of market traders
waiting to buy boxes of fish & then transport it on the canal to the
city for sale. it was quite a little carnival really there were
handcarts selling hot street food even a man with a cylinder of helium
selling balloons on string to the traders children

I realised that the Nawab's ceremonial barge was pulling into the
harbour.

In the middle of the barge was a fine mature asian elephant

Bemused I watched as the barge pulled into the lock , the gates closed &
the barge rose to my level.
A self important looking man left the barge followed by the elephant.
He walked up to me and said
"The all knowing Nawab has heard of you Monkey King and according to the law offers
you this challenge." handing me a card and a large felt tip pen he
continued " Before the firing of the noon day gun write on this card the
weight of this elephant to within 1% . You may use only what is here and
may construct nothing. fail or refuse and you must pay a forfeit of 100
gold coins , succeed and the the Nawab will consign to your monkey kingdom
100 rare snark bananas palms"
The traders & fishermen , who all disliked the Nawab, shouted words of
encouragement & offers of help to me but none had any bright ideas.
The solution came to me in a flash of inspiration & I won the challenge.
How?
Answer and you win 10WRZ$
Disclaimer
No elephants were harmed during this episode
Sherlock accepts no responsibility for sleep loss, head banging, damage
to walls, psychiatric fees, etc