ANSWER
10425
EXPLANATION
We want to multiply the numbers given by using product of parts.
To do this, we will split the number into hundred, tens and units. That is:
[tex](400\text{ + 10 + 7) }\cdot\text{ 25}[/tex]So that will be:
[tex]\begin{gathered} (400\cdot\text{ 25) + (10 }\cdot\text{ 25) + (7 }\cdot\text{ 25)} \\ =\text{ 10000 + 250 + 175} \\ =\text{ 10425} \end{gathered}[/tex]That is the answer.