A city built a hope primary school for the disaster-stricken area in Sichuan, investing 6 million yuan, saving 25% compared to the plan. How much is the original plan to invest?
某市为四川灾区新建一所希望小学，投资600万元，比计划节约了25%．原计划投资多少万元？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">600 / (3/4)</gadget>
<output>800</output>

<result>800</result>