brick weighs 2 kg, how many bricks weigh 1 ton.
一块砖重2千克，多少块砖重1吨．
<gadget id="calculator">1_000 / 2</gadget>
<output>500</output>

<gadget id="calculator">1 * 500</gadget>
<output>500</output>

<result>500</result>