Congcong is 13 years old this year, and his grandfather is 12 years older than four times Congcong's age. How old is grandpa?
聪聪今年13岁，爷爷的年龄比聪聪的年龄的4倍还多12岁，爷爷多大年龄？
<gadget id="calculator">13 * 4</gadget>
<output>52</output>

<gadget id="calculator">52 + 12</gadget>
<output>64</output>

<result>64</result>