The carbon dioxide absorbed by 100 square meters of forest in a day is about equal to the total amount of carbon dioxide exhaled by 10 people in a day; 1 hectare of forest releases about 0.73 tons of oxygen in a day, which is equivalent to the amount of oxygen inhaled by 1000 people in a day. Calculating based on these data, how many square meters of forest does a person need to obtain the oxygen needed for survival, and the carbon dioxide exhaled just happens to be completely absorbed?
100平方米森林一天吸收的二氧化碳，约等于10个人一天呼出的二氧化碳的总量；1公顷森林一天大约释放出0.73吨氧气，相当于1000人一天吸入的氧气量．根据这些数据算一算，一个人大约需要多少平方米的森林，才能获得生存所需的氧气，而呼出的二氧化碳又正好被完全吸收掉？
<gadget id="calculator">100 / 10</gadget>
<output>10</output>

<result>10</result>