A person rides a bicycle. On the first day, he travels the entire distance (2/5), on the second day he travels 20 kilometers, and on the third day, he travels the entire distance (1/3), which happens to be the entire distance. How many kilometers in total?
某人骑自行车，第一天行了全程的(2/5)，第二天行了20千米，第三天行了全程的(1/3)，正好行完全程．全程共多少千米？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

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

<gadget id="calculator">(2/5) + (1/3)</gadget>
<output>11/15 = around 0.733333</output>

<gadget id="calculator">1 - (11/15)</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">20 / (4/15)</gadget>
<output>75</output>

<result>75</result>