instruction:
The task is to generate the correct answer for a given math problem.
question:
Problem: ( 935421 x 625 ) = ?
answer:
584638125


question:
Problem: find the value of x : 2 x ² − 4 .
answer:
- 2,2


question:
Problem: a and b can do a piece of work in 10 days and 10 days respectively . they work together for 10 days and b leaves . in how many days the whole work is completed ?
answer:

30 days