There are 5 boxes of apples of equal weight in the fruit shop. If 30 kilograms are taken from each box, the remaining apples in the 5 boxes are exactly equal to the original two boxes of apples. How many kilograms does each box of apples weigh?
水果店有5箱等重的苹果，如果从每箱取出30千克，5箱里剩下的苹果正好等于原来两箱苹果．原来每箱苹果重多少千克？
<gadget id="calculator">5 - 2</gadget>
<output>3</output>

<gadget id="calculator">5 / 3</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">30 * (5/3)</gadget>
<output>50</output>

<result>50</result>