Grandpa is 73 years old this year, 2 years younger than 5 times Xiaogang's age. How old is Xiaogang?
爷爷今年73岁，比小刚年龄的5倍少2岁，小刚今年多少岁？
<gadget id="calculator">73 + 2</gadget>
<output>75</output>

<gadget id="calculator">75 / 5</gadget>
<output>15</output>

<result>15</result>