Xiao Ming is 12 years old this year, his grandfather is 5 years younger than his six times age, how old is his grandfather this year?
小明今年12岁，爷爷的年龄比他的6倍少5岁，爷爷今年多少岁？
<gadget id="calculator">12 * 6</gadget>
<output>72</output>

<gadget id="calculator">72 - 5</gadget>
<output>67</output>

<result>67</result>