A bottle of Coke, Xiao Ming drank (3/5) liters on the first day, and drank the rest (2/5) on the second day, which is exactly (3/5) liters. How many liters is this bottle of Coke in total?
一瓶可乐，小明第一天喝了(3/5)升，第二天喝了剩下的(2/5)，正好是(3/5)升，这瓶可乐一共多少升？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(3/5) / (2/5)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">(3/2) + (3/5)</gadget>
<output>21/10 = around 2.1</output>

<result>21/10 = around 2.1</result>