Answer :
300mm (obvious) 3m converted into mm is 300mm it cant be any number else only if the 3 changes as a 3.5m so that's 0.0035 (my teacher taught me this so It cant be wrong)
3 meters=3.2808 yards
3.2808 yards= 9.8424 feet
9.8424 feet= 188.1088 inches
3.2808 yards= 9.8424 feet
9.8424 feet= 188.1088 inches