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

Ex Input:
Problem: in one alloy there is 12 % chromium while in another alloy it is 8 % . 35 kg of the first alloy was melted together with 40 kg of the second one to form a third alloy . find the percentage of chromium in the new alloy .

Ex Output:
9.75 %


Ex Input:
Problem: the radius of the wheel of a bus is 100 cms and the speed of the bus is 66 km / h , then the r . p . m . ( revolutions per minutes ) of the wheel is

Ex Output:
175


Ex Input:
Problem: what is the remainder when 43 ^ 87 is divided by 5 ?

Ex Output:

2