A train travels 20 feet in 1/5 second. At this same speed, how many feet will it travel in three seconds

how i can resolve this problem ...i dont understand how can i do it?

1/5 (1 divide 5) 0.2
3 (the 3 seconds divide 0.2)
3/0.2 is 15 same as 30/2
15 times 20 feet can be split up
10 times 20 feet is 200
5 times 20 feet is 100
100 add 200 is 300

300 feet

Let's see, if the train moves 20ft in 1/5 second, it moves 100 ft in a second, because 20ft times 5 (to make 1/5 into 1) is 100. You then times this amount by 3, because there is 3 seconds in the question. The final answer is 300 ft.

20ft*5*3