Five years ago, the grandfather was 7 times the age of the grandson. The grandson is 14 years old this year. How old is the grandfather?
五年前爷爷年龄是孙子的7倍，孙子今年14岁，爷爷今年多少岁？
<gadget id="calculator">14 - 5</gadget>
<output>9</output>

<gadget id="calculator">9 * 7</gadget>
<output>63</output>

<gadget id="calculator">63 + 5</gadget>
<output>68</output>

<result>68</result>