The fruit store shipped in 500 kg of watermelons, and sold them on the first day (3/4). How many kilograms of watermelons are left in the fruit store?
水果店运进500千克西瓜，第一天卖出了(3/4)，水果店还剩下西瓜多少千克？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">500 * (1/4)</gadget>
<output>125</output>

<result>125</result>