A basket of eggs weighs 64 kilograms. After taking out half, take out the remaining half, and finally leave 19 kilograms. How many kilograms of eggs are there?
一筐鸡蛋，连筐重64千克，拿出一半后，又拿出剩下的一半，最后剩下19千克，原来有鸡蛋多少千克．
<gadget id="calculator">64 - 19</gadget>
<output>45</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/2)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) * (1/2)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/2) + (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">45 / (3/4)</gadget>
<output>60</output>

<result>60</result>