A farm raises 197 chickens, and the number of ducks is three times that of chickens. The total number of chickens and ducks is 90 more than the number of geese. How many geese are raised in this farm?
某饲养场养鸡197只，养鸭的只数是鸡的3倍，鸡、鸭的总只数比鹅的只数多90只，这个饲养场养了多少只鹅？
<gadget id="calculator">197 * 3</gadget>
<output>591</output>

<gadget id="calculator">197 - 90</gadget>
<output>107</output>

<gadget id="calculator">591 + 107</gadget>
<output>698</output>

<result>698</result>