Xiao Ming rides a bicycle from A to B at a speed of 8 kilometers per hour. If the speed per hour is increased (1/4), he can reach B half an hour earlier than before. How many kilometers are there between A and B?
小明骑自行车以每小时8千米的速度从甲地往乙地，如果每小时速度加快(1/4)就可以比原来提前半小时到达乙地．甲乙两地相距多少千米？
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

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

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">8 * (5/4)</gadget>
<output>10</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/8) - (1/10)</gadget>
<output>1/40 = around 0.025</output>

<gadget id="calculator">0.5 / (1/40)</gadget>
<output>20</output>

<result>20</result>