Grandpa is 75 years old this year, and his 4 grandchildren are 10, 11, 14, and 16 years old. How many years later will the ages of the 4 grandchildren be equal to the age of grandpa?
爷爷今年75岁，4个孙子分别是10、11、14、16岁，多少年后4个孙子的年龄和等于爷爷的年龄？
<gadget id="calculator">10 + 11 + 14 + 16</gadget>
<output>51</output>

<gadget id="calculator">75 - 51</gadget>
<output>24</output>

<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">24 / 3</gadget>
<output>8</output>

<result>8</result>