The average of the three numbers A, B, and C is 30. A's number is the sum of these three numbers (2/9). What is A's number?
甲、乙、丙三个数的平均数是30，甲数是这三个数的和的(2/9)，甲数是多少？
<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">30 * 3 * (2/9)</gadget>
<output>20</output>

<result>20</result>