Let us assume that I am at position A and that you are in position B. You are in front of me and I want to catch up with you. However, each minute, the distance between us halves. Will I ever reach you?
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If you think about it, for me to be at the same level as you, the distance between us must be 0. So, no matter which way you look at it 0 x 2 will always equal 0.