A tiger weighs 279 kg, a cow weighs twice as much as a tiger, and an elephant weighs 9 times as much as a cow. How much does the elephant weigh?
一头老虎重279千克，一头牛的体重是老虎的2倍，一头大象的体重是牛的9倍，这头大象重多少千克？
<gadget id="calculator">279 * 2</gadget>
<output>558</output>

<gadget id="calculator">558 * 9</gadget>
<output>5_022</output>

<result>5_022</result>