There are three boxes. If two boxes are weighed by two boxes, their weights are 83 kg, 85 kg, and 86 kg respectively. How many kilograms does the lightest box weigh?
有三个箱子，如果两箱两箱地称，它们的重量分别是83千克、85千克、86千克．最轻的箱子重多少千克？
<gadget id="calculator">127 - 86</gadget>
<output>41</output>

<result>41</result>