Question

leon is building a square picture frame. the side of the frame is 345 millimeters long. if a meter of wood cost $7, how much will the wood he needs cost?

Answer 1

Since it's a square, it has four sides, so you need to times four
$345 \times 4 = 1380$

$1280mm = 1.28m$
A meter of wood costs $7.

So,
$1.28 \times 7 = 8.96$

Answer : $8.96

Hope this helps. - M

Answer 2

First 1 meter is 1000 millimeters
So convert 345 mL to .345
Now multiply
.345 x 7
Answer is 2.145