Naughty asked Xiaoxiao: "How old are you this year?" Xiaoxiao replied: "Subtract 8 from my age, multiply 7, add 6, divide by 5, it is exactly equal to 4, please do the math, I Year old?"
淘气问笑笑："你今年几岁？"笑笑回答回答说："用我的年龄数减去8，乘7，加上6，除以5，正好等于4，请你算一算，我今年几岁？"
<gadget id="calculator">4 * 5</gadget>
<output>20</output>

<gadget id="calculator">20 - 6</gadget>
<output>14</output>

<gadget id="calculator">14 / 7</gadget>
<output>2</output>

<gadget id="calculator">2 + 8</gadget>
<output>10</output>

<result>10</result>