I am 40 years old this year. When my daughter is 5 years old, I am exactly 6 times her age. Do you know how old my daughter is?
我今年40岁了，女儿5岁时，我的年龄正好是她的6倍，你知道我女儿几岁了吗？
<gadget id="calculator">5 * 6</gadget>
<output>30</output>

<gadget id="calculator">40 - 30</gadget>
<output>10</output>

<gadget id="calculator">10 + 5</gadget>
<output>15</output>

<result>15</result>