Huiyin Home Appliances has a batch of air conditioners, 60 units are sold on the first day, and 20% of the total are sold on the second day. At this time, the ratio of the number of units sold to the number of remaining units is 1:1. How many units are there in this batch?
汇银家电有一批空调，第一天卖出60台，第二天卖出总数的20%，这时已卖出的台数和剩下台数的比是1：1，这批空调有多少台？
<gadget id="calculator">1 + 1</gadget>
<output>2</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/2) - (1/5)</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">60 / (3/10)</gadget>
<output>200</output>

<result>200</result>