(2/25)/(8/25)((7/8)+(13/16))/(13/16)(1-(3/5))x=(1/10) (solution equation)
(2/25)/(8/25)((7/8)+(13/16))/(13/16)(1-(3/5))x=(1/10)(解方程)
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

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

<gadget id="calculator">(1/10) / (2/5)</gadget>
<output>1/4 = around 0.25</output>

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