A is 1.2 times the average of the numbers A, B, and C. If the sum of the numbers B and C is 99, what is the number of A?
甲是甲、乙、丙三数的平均数的1.2倍，如果乙、丙两数的和是99，那么甲数是多少．
<gadget id="calculator">3 - 1.2</gadget>
<output>1.8</output>

<gadget id="calculator">99 / 1.8</gadget>
<output>55</output>

<gadget id="calculator">1.2 * 55</gadget>
<output>66</output>

<result>66</result>