Three people, A, B, and C, have an average weight of 60 kg. The average weight of A and B is 3 kg more than that of C. A is 3 kg heavier than C. What is the weight of B in kg?
甲、乙、丙三人，平均体重60千克，甲与乙的平均体重比丙的体重多3千克，甲比丙重3千克，则乙的体重为多少千克．
<gadget id="calculator">60 * 3</gadget>
<output>180</output>

<gadget id="calculator">180 + 3</gadget>
<output>183</output>

<gadget id="calculator">183 / 3</gadget>
<output>61</output>

<result>61</result>