He Lin's family has 6 times more chickens than geese, 8 more ducks than geese, and 15 ducks. How many chickens does He Lin's family raise?
贺林家养鸡的只数是鹅的6倍，鸭比鹅多8只，鸭有15只．贺林家养了多少只鸡．
<gadget id="calculator">15 - 8</gadget>
<output>7</output>

<gadget id="calculator">7 * 6</gadget>
<output>42</output>

<result>42</result>