Input (grade 13): "Give me a place to stand, and I shall move the earth with a lever" is a remark of Archimedes who formally stated the correct mathematical principle of levers (quoted by Pappus of Alexandria).
Output (grade 7): "Give me a place to stand, and I shall move the earth." is a famous quote of Archimedes who stated the correct mathematical principle of levers (quoted by Pappus of Alexandria).