According to calculations, the resources on the earth can be used for 100 million people to live for 100 years, or for 8 billion people to live for 300 years. Assuming that the growth rate of newly generated resources on the earth is constant, how many billions of people can the earth support at most in order to enable human beings to have the potential for continuous development?
经测算，地球上的资源可供100亿人生活100年，或可供80亿人生活300年．假设地球新生成的资源增长速度是一定的，为使人类有不断发展的潜力，地球最多能养活多少亿人？
<gadget id="calculator">80 * 300</gadget>
<output>24_000</output>

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

<gadget id="calculator">24_000 - 10_000</gadget>
<output>14_000</output>

<gadget id="calculator">14_000 / 200</gadget>
<output>70</output>

<result>70</result>