The Brothers Grimm 
The Valiant Little Tailor 

In The Valiant Little Tailor a tailor parleys his success at killing seven flies in one stroke into a string of unlikely successes. Making a belt with the words Seven at one blow written on it, the gullible townspeople assume the tailor to have amazing strength. After a contest in which he tricks a giant into believing he is stronger, the tailor persuades the king he can rid the kingdom of giants. In exchange for this the king offers his daughter’s hand in marriage and half his kingdom. When the king balks on this promise and creates more conditions, the tailor must again rely on his wits to prove his bravery.