Xiaodong is 13 years old this year, and his grandfather is 5 times his age. 4 years old, how old is his grandfather this year?
小东今年13岁，爷爷的年龄是他的5倍多4岁，爷爷今年多少岁．
<gadget id="calculator">13 * 5</gadget>
<output>65</output>

<gadget id="calculator">65 + 4</gadget>
<output>69</output>

<result>69</result>