A standard gold bar weighs 400 troy ounces400 \text{ troy ounces}400 troy ounces. If 1 troy ounce≈31.1 grams1 \text{ troy ounce} \approx 31.1 \text{ grams}1 troy ounce≈31.1 grams, what is the weight in kilograms?
1.244 kg1.244 \text{ kg}1.244 kg
12.44 kg12.44 \text{ kg}12.44 kg
0.1244 kg0.1244 \text{ kg}0.1244 kg
124.4 kg124.4 \text{ kg}124.4 kg