then they adopted the one below, which you commonly see, in 1998
More facts at http://www.did-you-kno.tumblr.com
Step1: Think of any number. Step2: Double the number. Step3: Add 9 with result. Step4: sub 3 with the result. Step5: Divide the result by 2. Step6: Subtract the number with the first number you started with.
And the result will be http://did-you-kno.tumblr.com/ans