The grandfather is 65 years old this year, and his age is 13 times that of his grandson. After 5 years, how many times will his age be that of his grandson?
爷爷今年65岁，年龄是孙子的13倍，5年后，爷爷年龄是孙子的多少倍．
<gadget id="calculator">65 / 13</gadget>
<output>5</output>

<gadget id="calculator">65 + 5</gadget>
<output>70</output>

<gadget id="calculator">5 + 5</gadget>
<output>10</output>

<gadget id="calculator">70 / 10</gadget>
<output>7</output>

<result>7</result>