Xiaohua is 5 years old this year. Grandpa's age is a multiple of Xiaohua's age, and it is an even number with a factor of 3. What is the age of grandpa this year?
小华今年5岁，爷爷的年龄是小华年龄的倍数，且是偶数，又有因数3，爷爷今年可能是多少岁．
<gadget id="calculator">2 * 3 * 5</gadget>
<output>30</output>

<gadget id="calculator">30 * 2</gadget>
<output>60</output>

<result>60</result>