Solution ratio: (3/2): (1/5) = (3/4): X.
解比例：(3/2)：(1/5)=(3/4)：X．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(3/4) * (1/5)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">(3/20) / (3/2)</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>