A certain unit held an activity to celebrate "May 1st" and bought 4 boxes of apples with the same weight. After taking out 27 kilograms from each box, the sum of the weight of the remaining apples was exactly equal to the weight of the original box. How many kilograms did each box of apples weigh? ?
某单位举行庆"五一"活动，买来4箱同样重的苹果，从每箱中取出27千克后，所剩的苹果重量的和恰好等于原来一箱的重量，原来每箱苹果重多少千克？
<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">4 / 3</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">27 * (4/3)</gadget>
<output>36</output>

<result>36</result>