Question

fill in the missing number:
6 4
× 7 8
-------
□□□
+ 4,4 8 0
-------
4,9 9 2

Explanation:

Step1: Set up missing value equation

Let the missing number be $x$. The equation is $x + 4480 = 4992$.

Step2: Solve for missing value

Rearrange to isolate $x$: $x = 4992 - 4480$
$x = 512$

Answer:

512