there is a mistake in each line..coorect this passage and dont forget to underline the answer u have supplied

It was at this moment that Birbal entered a courtyard. 
Birbal who know the nature of the emperor quickly 
grasped the situation when asked, "May I know the 
question so that I can try to an answer". Akbar said, 
"How many crows are their in this city?" Without even the
moment's thought, Birbal replied "There are fifty 
thousand five hundred and eighty nine crows, his lord". 
"How can you being so sure?" asked Akbar.​