(2/3): (1/10) = (5/6): X.
(2/3)：(1/10)=(5/6)：X．
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

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

<gadget id="calculator">(5/6) * (1/10)</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(1/12) / (2/3)</gadget>
<output>1/8 = around 0.125</output>

<result>1/8 = around 0.125</result>