please be ready to EXPLAIN your answer (include brainiest)

Answer:
10.5
Step-by-step explanation:
For volume you do lengthxwidthxheight
The width is 4 blocks. If each block is .5 (1/2) CM that would make the width 2CM
The height is 7 blocks. each block being .5 you can just do 7 divided by 2 (since .5 is just half) which would get you 3.5
for length it is 3 blocks so just like we did for height just do 3/2 which is 1.5
If you put this in the order you do
1.5*2*3.5 which gets you 10.5
1.5*2 is 3.
3*3.5 is 10.5
Answer:
125 cm ^2
Step-by-step explanation:
1cm 1 cm 1cm times the rest