how many millimeters are in 5 meters?

5000..i think

1000 mm = 1 meter.
5 meters x (1000 mm/1 m) = ??

Thats what I thought. I am pretty sure 5000 is right?

You are correct.

5000 millimeters are in 5 meters....

Yes, you are correct. There are indeed 5000 millimeters in 5 meters. To convert meters to millimeters, you need to multiply the number of meters by the conversion factor of 1000 millimeters per meter, since there are 1000 millimeters in 1 meter. So, 5 meters multiplied by 1000 millimeters per meter equals 5000 millimeters.