From A to B, on the first day, I drove the whole distance (1/5), on the second day I drove the rest of the distance (1/3), leaving 300 kilometers. How many kilometers are there between A and B?
从甲地到乙地，第一天行驶了全程的(1/5)，第二天行驶了剩下路程的(1/3)，还剩下300千米．甲、乙两地相距多少千米？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

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

<gadget id="calculator">(4/5) * (1/3)</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">1 - (1/5) - (4/15)</gadget>
<output>8/15 = around 0.533333</output>

<gadget id="calculator">300 / (8/15)</gadget>
<output>1_125/2 = around 562.5</output>

<result>1_125/2 = around 562.5</result>