The task is to generate the correct answer for a given math problem.

[Q]: Problem: convert 2 / 5 to a decimal
[A]: 0.4


[Q]: Problem: 6 ) a marketing firm determined that , of 260 households surveyed , 80 used neither brand a nor brand b soap . 60 used only brand a soap and for every household that used both brands of soap , 3 used only brand b soap . how many of the 200 household surveyed used both brands of soap ?
[A]: c ) 30


[Q]: Problem: a train running at the speed of 60 km / hr crosses a pole in 7 sec . what is the length of the train ?
[A]:
116.6