There are 4 girls and 2 boys living in a building, their ages are different, the oldest is 10 years old, and the youngest is 4 years old. The oldest boy is 4 years older than the youngest girl, and the oldest girl is 4 years older than the youngest boy. How old is the oldest boy?
某楼住着4个女孩和两个男孩，他们的年龄各不相同，最大的10岁，最小的4岁．最大的男孩比最小的女孩大4岁，最大的女孩比最小的男孩也大4岁．最大的男孩多少岁？
<gadget id="calculator">4 + 4</gadget>
<output>8</output>

<result>8</result>