Naughty is 12 years old this year, and his grandpa is 6 times his age and is 5 years old. How old is grandpa this year?
淘气今年12岁，爷爷的年龄是他的6倍多5岁，爷爷今年多大？
<gadget id="calculator">12 * 6</gadget>
<output>72</output>

<gadget id="calculator">72 + 5</gadget>
<output>77</output>

<result>77</result>