Two people walk toward each other from both ends of the bridge. A takes 8 minutes to walk across the bridge, and B takes 10 minutes to walk across the bridge. How much faster is A's speed than B's.
两人从桥的两端相向而行，甲用8分钟走完这座桥，乙用10分钟走完这座桥，甲的速度比乙的速度快多少．
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</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">(1/40) / (1/10)</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>