A computer company buys back a batch of computers, sells (1/6) in the first week, and sells 39 units in the second week. At this time, the ratio of the number of remaining units to the sales is 2:3. This batch of computers was originally How many units are there?
某电脑公司购回一批电脑，第一个星期卖出(1/6)，第二个星期卖出39台，这时剩下的台数与卖出的比是2：3，这批电脑原有多少台？
<gadget id="calculator">13 / 18</gadget>
<output>13/18 = around 0.722222</output>

<gadget id="calculator">39 / (13/18)</gadget>
<output>54</output>

<result>54</result>