The average weight of A, B, and C is 49 kg. It is known that A weighs 48 kg and B weighs 47 kg. What is the weight of C in kg?
甲乙丙三人的平均体重为49千克，已知甲的体重为48千克，乙的体重为47千克，那么丙的体重是多少千克．
<gadget id="calculator">49 * 3</gadget>
<output>147</output>

<gadget id="calculator">147 - 48 - 47</gadget>
<output>52</output>

<result>52</result>