A pack of washing powder is 500 grams, how many kilograms are 8 packs of washing powder?
一包洗衣粉是500克，8包洗衣粉是多少千克．
<gadget id="calculator">8 / 1_000</gadget>
<output>1/125 = around 0.008</output>

<gadget id="calculator">500 * (1/125)</gadget>
<output>4</output>

<result>4</result>