A store has 6 boxes of oranges, each of equal weight. If after removing 3 kilograms from each box, the remaining weight is exactly equal to the weight of the original 4 boxes, how many kilograms did each box of oranges weigh?
商店有6箱橘子，每箱重量相等．如果从每箱中取出3千克后，剩下的恰好等于原来4箱的重量，原来每箱橘子重多少千克？
<gadget id="calculator">3 * 6</gadget>
<output>18</output>

<gadget id="calculator">6 - 2</gadget>
<output>4</output>

<gadget id="calculator">18 / 4</gadget>
<output>9/2 = around 4.5</output>

<result>9/2 = around 4.5</result>