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

[EX Q]: Problem: excluding stoppages , the average speed of a bus is 60 km / hr and including stoppages , the average speed of the bus is 15 km / hr . for how many minutes does the bus stop per hour ?
[EX A]: 4

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

[EX Q]: Problem: if an average hard drive had a capacity of 0.4 tb in 2000 , and average hard drive capacities double every 5 years , what will be the average hard drive capacity in 2050 ?
[EX A]:
4096