Math Help - Evaluating Vector Expressions

Hi I have to evaluate the following vector expression and can't remember how to do it

3 (4, -7, 0)

Can you help?

Amarillus does this mean to multiply the vector v(4,-7,0 ) by 3
if so then you will get a new vector (12,-21,0) that you can express in full format like this : 12i-21j+0k .