Xiao Hua is 10 years old this year, and Xiao Ming is 5 years older than Xiao Hua. Xiao Ming's father is four times as old as Xiao Hua, how old is Xiao Ming's father this year?
小华今年10岁，小明比小华大5岁．小明爸爸的年龄是小华的4倍，小明爸爸今年多少岁．
<gadget id="calculator">10 * 4</gadget>
<output>40</output>

<result>40</result>