There are 120 roosters in the farm, and 40 more hens than roosters. How many chickens are there in total? what is the correct formula
养殖场养了120只公鸡，母鸡比公鸡多40只，一共养了多少只鸡？正确算式是多少
<gadget id="calculator">120 + 40</gadget>
<output>160</output>

<gadget id="calculator">160 + 120</gadget>
<output>280</output>

<result>280</result>