A ship travels from port A to port B at a speed of 63 kilometers per hour. After traveling the whole distance (1/4), it travels for another hour. At this time, the ratio of the distance traveled to the distance traveled is 2: 3. How many kilometers is the distance between A and B ports?
一艘轮船以每小时63千米的速度从甲港开往乙港，行了全程的(1/4)后，又行驶了1小时，这时未行路程与已行路程的比为2：3，甲乙两港相距多少千米？
<gadget id="calculator">2 + 3</gadget>
<output>5</output>

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

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(2/5) - (1/4)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 / (3/20)</gadget>
<output>20/3 = around 6.666667</output>

<gadget id="calculator">63 * (20/3)</gadget>
<output>420</output>

<result>420</result>