correct answer is: b) 7440

Explanation

The wrong multiplication is \left(3582\times372\right)
\rightarrow 1332504
The correct multiplication is \left(3562\times372\right)
\rightarrow 1325064
\therefore His answer is too great by \left(1332504-1325064\right)
\rightarrow 7440
Ans: His answer is too great by 7440.

An additional variation of this particular query can be considered:

1. What is the excess in the answer resulting from multiplying 3582 by 372 instead of the correct calculation of 3562 by 372?
2. Calculate the discrepancy in the outcome when mistakenly multiplying 3582 by 372 instead of the intended 3562 by 372.
3. How much greater is the product of 3582 and 372 than the correct result of 3562 and 372 due to the student’s mistake?
4. Identify the excess in the result when multiplying 3582 by 372 instead of the correct calculation of 3562 by 372.
5. Difference between the product of 3582 and 372 and the correct product of 3562 and 372 due to student’s mistake.