If 1,000 smokers smoke one less cigarette per day, they can reduce the emission of 0.37 tons of carbon dioxide a year. If each of the 450 million smokers across the country smokes one less cigarette per day, how much carbon dioxide can be reduced in half a year?
1000个烟民每人每天少吸一支烟，一年可减排0.37吨的二氧化碳．如果全国4.5亿个烟民每人每天少吸一支烟，半年可减排多少二氧化碳？
<gadget id="calculator">0.00037 * 450_000_000</gadget>
<output>166_500</output>

<result>166_500</result>