An elephant eats 420 kilograms of food every day, so how many kilograms of food can an elephant eat in a week?
一头大象每天吃420千克食物，那么一头大象一个星期能吃多少千克食物？
<gadget id="calculator">420 * 7</gadget>
<output>2_940</output>

<result>2_940</result>