The average of A and B is 33, the average of A and C is 31, and the average of B and C is 35. What is the sum of the three numbers of A, B, and C?
甲乙的平均数是33，甲丙的平均数是31，乙丙的平均数是35，甲乙丙三个数的和是几？
<gadget id="calculator">33 * 2</gadget>
<output>66</output>

<gadget id="calculator">31 * 2</gadget>
<output>62</output>

<gadget id="calculator">35 * 2</gadget>
<output>70</output>

<gadget id="calculator">66 + 62 + 70</gadget>
<output>198</output>

<gadget id="calculator">198 / 2</gadget>
<output>99</output>

<result>99</result>