The length of a piece of lumber is 6.5 meters . how many centimeters is this?

650 centimeters

To convert meters to centimeters, you need to multiply the length in meters by 100, since there are 100 centimeters in 1 meter.

So, to convert 6.5 meters to centimeters, you would calculate:

6.5 meters * 100 centimeters/meter

This simplifies to:

650 centimeters

Therefore, a piece of lumber that is 6.5 meters long is equal to 650 centimeters.