There are 45 roosters in one room of Huayu Chicken Farm, and five times as many hens as roosters. How many hens are there in this room?
华誉养鸡场一房内有公鸡45只，母鸡只数是公鸡的5倍，这个房内共有多少只母鸡？
<gadget id="calculator">45 * 5</gadget>
<output>225</output>

<result>225</result>