The diameter of the earth is 12,800 kilometers. The distance from the moon to the earth is 30 times the diameter of the earth. How far is the distance from the moon to the earth?
地球直径1.28万千米，月球到地球的距离是地球直径的30倍，月球到地球有多远？
<gadget id="calculator">1.28 * 30</gadget>
<output>38.4</output>

<result>38.4</result>