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

[EX Q]: Problem: find the area of a parallelogram with base 10 cm and height 20 cm .
[EX A]: 200

[EX Q]: Problem: which number can we add to 425897 to get a number exactly divisible by 456 ?
[EX A]: 7

[EX Q]: Problem: mary , peter , and lucy were picking chestnuts . mary picked twice as much chestnuts than peter . lucy picked 2 kg more than peter . together the 3 of them picked 26 kg of chestnuts . how many kilograms did mary pick ?
[EX A]:
12