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

[Q]: Problem: if 1.5 cm of a pencil is purple , 0.5 cm of the remaining is black and the remaining 2 cm is blue , what is the total length of the pencil ?
[A]: 4 cm


[Q]: Problem: solution y is 30 percent liquid x and 70 percent water . if 2 kilograms of water evaporate from 6 kilograms of solution y and 2 kilograms of solution y are added to the remaining 4 kilograms of liquid , what percent of this new solution is liquid x ?
[A]: 40 %


[Q]: Problem: if 20 % of a number = 300 , then 120 % of that number will be ?
[A]:
1800