The store shipped 6 baskets of watermelons, each weighing 108 kilograms. How many kilograms are there in total?
商店运来6筐西瓜，每筐重108千克，这些西瓜一共有多少千克？
<gadget id="calculator">108 * 6</gadget>
<output>648</output>

<result>648</result>