Red Star Company built an office building. It originally planned to invest 7.8 million yuan, but the actual investment was the original plan (7/8). How much yuan was saved compared to the original plan?
红星公司建一座办公楼，原计划投资780万元，实际投资是原计划的(7/8)，比原计划节约了多少万元？
<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">1 - (7/8)</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">780 * (1/8)</gadget>
<output>195/2 = around 97.5</output>

<result>195/2 = around 97.5</result>