A baby elephant weighs 100 kg at birth and 5 tons as an adult. How much weight has the elephant gained from birth to adulthood?
一头幼象出生时重100千克，到成年时重5吨．这头象从出生到成年体重增加了多少千克．
<gadget id="calculator">5 * 1_000</gadget>
<output>5_000</output>

<gadget id="calculator">5_000 - 100</gadget>
<output>4_900</output>

<result>4_900</result>