According to the research of scientists, the carbon dioxide absorbed by 100 square meters of forest is equal to the carbon dioxide exhaled by 10 people every day; 0.73 tons of oxygen is released by 1 hectare of forest every day, which is equal to the oxygen needed by 1000 people to breathe every day. How many hectares of forest can be used by 10,000 people for 100 days to breathe, and at the same time can completely absorb the carbon dioxide exhaled during these 100 days.
据科学家研究，100平方米森林每天吸收的二氧化碳等于10个人每天呼出的二氧化碳；1公顷森林每天释放0.73吨的氧气，等于1000人每天呼吸所需要的氧气．多少公顷的森林可供10000人100天呼吸所需，并同时可将这100天所呼出的二氧化碳完全吸收．
<gadget id="calculator">100 / 10_000 / 10</gadget>
<output>1/1_000 = around 0.001</output>

<gadget id="calculator">10_000 * 100 * (1/1_000)</gadget>
<output>1_000</output>

<gadget id="calculator">100 / 1_000</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">10_000 * (1/10)</gadget>
<output>1_000</output>

<result>1_000</result>