Li Dong planned to spend 800 yuan for living expenses last month, but he actually saved 5% compared to the plan. How much did he actually spend last month?
李东上个月计划用生活费800元，实际比计划还节省了5%，他上个月实际用了多少钱呢？
<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">1 - (1/20)</gadget>
<output>19/20 = around 0.95</output>

<gadget id="calculator">800 * (19/20)</gadget>
<output>760</output>

<result>760</result>