The speed of sound in air is approximately 343 m/s343 \text{ m/s}343 m/s. What is this speed in km/h\text{km/h}km/h?
1234.8 km/h1234.8 \text{ km/h}1234.8 km/h
1.23 km/h1.23 \text{ km/h}1.23 km/h
123.48 km/h123.48 \text{ km/h}123.48 km/h
343×3.6 km/h343 \times 3.6 \text{ km/h}343×3.6 km/h