Hongxing Primary School helps the park to plant lawns. The original plan was to plant 27.9 square meters per day and finish planting in 5 days. In fact, the task was completed in only 4 and a half days. How much more square meters is actually added per day than the original plan?
红星小学帮助公园种草坪．原计划每天种27.9平方米，5天种完．实际只用4天半就完成了任务，实际每天比原计划多种多少平方米？
<gadget id="calculator">5 / 4.5</gadget>
<output>1.111111</output>

<gadget id="calculator">27.9 * 1.111111</gadget>
<output>30.999997</output>

<gadget id="calculator">30.999997 - 27.9</gadget>
<output>3.099997</output>

<result>3.099997</result>