One time the beautiful Princess Leia was skimming low over a the surface of a small planet at the familiar highway speed of a mile a minute, except she was in orbit. She had just made a complete circuit which took 125 and 2/3 minutes when giant rats reached up and caught her in an industrial-size butterfly net.
The rats took the Princess to their king, a handsome and well-endowed rat who was bigger and more evil-minded than the rest. The Rat King had Leia spread-eagled in his royal bed chamber and informed her that unless she immediately told him the mass of the planet she would be gang-raped by himself and his minions.
The Princess reflected that 125 and 2/3 divided by 2 pi is 20. She then curled her lip defiantly and told him that the planet's mass was 20 quadrillion (that is 20 x 10^15) talents.
"We do not use talents here," said the Rat King with a hideous smile, "our unit of mass is the price in silver of a Life; 30 shekels to be exact."
"Despicable Rat," declared Leia scornfully, "according to Talmud weights, the shekel is 1/1500 of a talent, so that the 30 coins of silver you mention amount to but a fiftieth of a talent. Your planet's mass is a quintillion (10^18) times the price in silver paid to the Betrayer."
"Curses," said the Rat King, and had his prisoner released and put safely back aboard her ship.