In a chicken farm, there are 265 roosters, and 12 hens are 3 times less than roosters. How many hens are there?
养鸡场，公鸡有265只，母鸡比公鸡的3倍少12只，母鸡有多少只？
<gadget id="calculator">265 * 3</gadget>
<output>795</output>

<gadget id="calculator">795 - 12</gadget>
<output>783</output>

<result>783</result>