The farm raises 90 ducks, and the number of chickens is 7 times that of ducks. How many chickens and ducks are raised in the farm?
养殖场养鸭90只，养的鸡是鸭的7倍，养殖场一共养了多少只鸡鸭？
<gadget id="calculator">90 * 7</gadget>
<output>630</output>

<gadget id="calculator">630 + 90</gadget>
<output>720</output>

<result>720</result>