The conversation between human and AI assistant.
[|Human|] The input is given in the form of average speed and time in hours. Calculate the distance travelled.
[|AI|] Distance = Average speed x Time 
= 70 mph x 4 hours 
= 280 miles

The distance travelled is 280 miles.
[|Human|] 
The input is given in the form of average speed and time in hours. Calculate the distance travelled.