Mom bought 2 bottles of juice, weighing 4 kg in total. If my mother buys 4 bottles of this juice, how many grams does it weigh?
妈妈买了2瓶果汁，共重4千克．如果妈妈买4瓶这样的果汁，那么重多少克．
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 * 4</gadget>
<output>8</output>

<result>8</result>