One day, the passenger car goes to grandma's house, and the average speed of the passenger car is 50.4 km/h. Mingming started at 9:20 and didn't arrive at grandma's house until 11:50. How many kilometers is Mingming's house from grandma's house?
一天明明乘客车去外婆家，客车的平均速度是50.4千米/时．明明从9：20开始出发直到11；50才到外婆家，明明家离外婆家约有多少千米？
<gadget id="calculator">50.4 * 2.5</gadget>
<output>126</output>

<result>126</result>