In 2008, in order to revitalize the economy, my country invested 4 trillion yuan to expand domestic demand, of which 3.75% was used for the development of social undertakings such as health, education, and culture, that is, how many billion yuan was invested.
2008年我国为振兴经济，投资4万亿元扩大内需，其中用于卫生，教育，文化等社会事业发展占3.75%，即投资多少亿元．
<gadget id="calculator">4 * 10_000</gadget>
<output>40_000</output>

<gadget id="calculator">3.75 / 100</gadget>
<output>0.0375</output>

<gadget id="calculator">40_000 * 0.0375</gadget>
<output>1_500</output>

<result>1_500</result>