A batch of TV sets were shipped from the store, and (1/3) of the TV sets were sold in the first week, and the rest (1/4) were sold in the second week, and there were still 30 sets left. How many units are there?
商店运来一批电视机，第一周卖了这批电视机的(1/3)，第二周卖了余下的(1/4)，这时还剩下30台，这批电视机一共有多少台？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">30 / (3/4) / (2/3)</gadget>
<output>60</output>

<result>60</result>