462 = 2 * 3 * 7 * 11,
20790 = 2 * 5 * 3 * 3 * 3 * 7 * 11,
462/20790 = (2 * 3 * 7 * 11) / (2 * 5 * 3 * 3 * 3 * 7 * 11) = 1 / (5*3*3) = 1/45
462 = 2 * 3 * 7 * 11,
20790 = 2 * 5 * 3 * 3 * 3 * 7 * 11,
462/20790 = (2 * 3 * 7 * 11) / (2 * 5 * 3 * 3 * 3 * 7 * 11) = 1 / (5*3*3) = 1/45