A batch of rice was shipped from the cafeteria. The plan was to eat only 5 kilograms per day for 30 days, but the result was that I ate less for 10 days. How many kilograms more did I eat per day than the original plan?
食堂运来一批大米，计划每天只吃5千克，可以吃30天，结果少吃了10天，实际平均每天比原计划多吃几千克？
<gadget id="calculator">30 - 10</gadget>
<output>20</output>

<gadget id="calculator">30 / 20</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">5 * (3/2)</gadget>
<output>15/2 = around 7.5</output>

<gadget id="calculator">(15/2) - 5</gadget>
<output>5/2 = around 2.5</output>

<result>5/2 = around 2.5</result>