There are 3 boxes, if they are weighed by two boxes, they are 83 kg, 85 kg and 86 kg respectively. How many kilograms does the lightest box weigh?
有3个箱子，如果两箱两箱地称它们的重量，分别是83公斤、85公斤和86公斤．其中最轻的箱子重多少公斤．
<gadget id="calculator">127 - 86</gadget>
<output>41</output>

<result>41</result>