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

Ex Input:
Problem: find the area of trapezium whose parallel sides are 20 cm and 18 cm long , and the distance between them is 20 cm ?

Ex Output:
380 cm 2


Ex Input:
Problem: 2,7 , 17,3 , 11,19 , 5,13 , __

Ex Output:
23


Ex Input:
Problem: the area of a rectangular plot is 460460 square metres . if the length is 15 % 15 % more than the breadth , what is the breadth of the plot ?

Ex Output:

20 metres