Three people, A, B, and C, have an average weight of 63 kg. The average weight of A and B is 3 kg more than that of C. A is 2 kg heavier than C. Find B's weight.
甲、乙、丙三人，平均体重63千克，甲与乙的平均体重比丙的体重多3千克，甲比丙重2千克，求乙的体重．
<gadget id="calculator">63 * 3</gadget>
<output>189</output>

<gadget id="calculator">189 + 3</gadget>
<output>192</output>

<gadget id="calculator">192 / 3</gadget>
<output>64</output>

<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">64 - 1</gadget>
<output>63</output>

<result>63</result>