Euler Project Problem #040

euler40.rb

# Solution to Project Euler's fortieth problem
# http://projecteuler.net/index.php?section=problems&id=40
# Find the product of the first, tenth, hundredth, thousandth, ten-thousandth, hundred-thousandth, and millionth digit of the irrational fraction created by concatenating the positive integers.

count = 0
ceiling = 1000000
number = ""
until number.length > ceiling do 
	count += 1
	number.concat count.to_s
end
p number.slice(0).to_i * number.slice(9).to_i * number.slice(99).to_i * number.slice(999).to_i * number.slice(9999).to_i * number.slice(99999).to_i * number.slice(999999).to_i