Answer:

So we all know that a dozen is equivalent to 12 pieces.

Then, 1.5 multiplied by 12 is equal to 18 meters. Converting 18 meters to centimeters will give us 1,800 centimeters

The answer is.

1,800 centimeters of ribbon will be needed for a dozen of gifts if a gift box needs 1.5 meters of ribbon.

God bless you. Keep it up.

Ps. if there's a formula, or a correct process to answer it, apply it.