The average of the three numbers A, B, and C is 36, and the average of the two numbers B, C is 28, so what is the number of A?
甲乙丙三个数的平均数是36，乙丙两数的平均数是28，那么甲数是多少？
<gadget id="calculator">36 * 3</gadget>
<output>108</output>

<gadget id="calculator">28 * 2</gadget>
<output>56</output>

<gadget id="calculator">108 - 56</gadget>
<output>52</output>

<result>52</result>