A coin weighs 4 grams, what is the approximate weight of 100 million coins?
一枚硬币重4克，1亿枚硬币大约重多少吨．
<gadget id="calculator">1_000_000_000 / 10_000_000</gadget>
<output>100</output>

<gadget id="calculator">4 * 100</gadget>
<output>400</output>

<result>400</result>