A bag of rice, I ate (1/5) on the first day and the rest (1/4) on the second day, leaving 7.5kg. How many kilograms does this bag of rice have?
一袋大米，第一天吃了(1/5)，第二天吃了剩下的(1/4)，还剩下7.5kg，这袋大米一共有多少千克？
<gadget id="calculator">1 / 4</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">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">7.5 / (3/4) / (4/5)</gadget>
<output>12.5</output>

<result>12.5</result>