The kindergarten bought 100 kilograms of apples and ate (1/5) on the first day and (1/4) on the second day. How many kilograms were eaten in total in the two days?
幼儿园买来100千克苹果，第一天吃了(1/5)，第二天吃了(1/4)，两天一共吃了多少千克？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/5) + (1/4)</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">100 * (9/20)</gadget>
<output>45</output>

<result>45</result>