hare runs 41 kilometers per hour, and a swift flies four times faster than the hare. How much faster does the swift fly per hour than the hare?
一只野兔每小时跑41千米，一只雨燕的飞行速度是野兔的4倍，雨燕每小时的飞行速度比野兔快多少？
<gadget id="calculator">41 * 4</gadget>
<output>164</output>

<gadget id="calculator">164 - 41</gadget>
<output>123</output>

<result>123</result>