The fruit shop brings in 36 baskets of fruit, each weighing 25 kilograms. Sell 320 kilograms, how many kilograms are left?
水果店运进36筐水果，每筐25千克．卖出320千克，还剩多少千克？
<gadget id="calculator">36 * 25</gadget>
<output>900</output>

<gadget id="calculator">900 - 320</gadget>
<output>580</output>

<result>580</result>