How do you write numbers in scientific notation?

Example: 
123456 in scientific notation would be 
1.23456x10^5 
you rewrite the number so it is less than 10 but more than 1 and multiply it by 10 to the power of however many decimal places it takes to get the number back to its original form

Well if you have 20 bats you probably want 20 balls? you don’t have enough context to answer the question.