Grandpa’s age is four times that of Xiaohua’s and is 7 years old. Grandpa is 75 years old this year. How old is Xiaohua this year?
爷爷的年龄比小华的年龄4倍多7岁，爷爷今年75岁，小华今年多少岁？
<gadget id="calculator">75 - 7</gadget>
<output>68</output>

<gadget id="calculator">68 / 4</gadget>
<output>17</output>

<result>17</result>