The starting fare of a taxi in Changde City is 5 yuan (limited to 4 kilometers), and an additional 1.5 yuan will be charged for every 1 kilometer. On Sunday, Xiaoming's family took a taxi from home to visit their grandparents. When getting off the bus, Dad paid 29 yuan, so please do the math, how far is it from Xiao Ming's house to grandparents' house?
常德市的出租车起步价是5元(限定4千米内)，每超过1千米要多付1.5元．星期天小明一家人坐出租车从家出发到爷爷奶奶家看望他们．下车时，爸爸付了29元钱，那么请你算一算，小明家到爷爷奶奶家有多远？
<gadget id="calculator">29 - 5</gadget>
<output>24</output>

<gadget id="calculator">24 / 1.5</gadget>
<output>16</output>

<gadget id="calculator">16 + 4</gadget>
<output>20</output>

<result>20</result>