From Dongcheng to Xicheng, A needs 8 hours and B takes 10 hours. How much faster is A’s speed than B’s?
从东城到西城，甲需要8小时，乙需要10小时，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>