Pick oranges in the Huaguoshan orange orchard on Monday, and put them in a bag of 25 kilograms. After packing 28 bags, there are 15 kg left. How many kilograms of oranges were picked on Monday?
星期一花果山桔园里摘桔子，25千克装一袋．装好28袋后，还剩15千克．星期一共摘了多少千克桔子？
<gadget id="calculator">25 * 28</gadget>
<output>700</output>

<gadget id="calculator">700 + 15</gadget>
<output>715</output>

<result>715</result>