What is the product of (3/5) minus (3/20) multiplied by (1/4)?
(3/5)减去(3/20)的差乘以(1/4)，积是多少？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">3 / 20</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">(3/5) - (3/20)</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(9/20) * (1/4)</gadget>
<output>9/80 = around 0.1125</output>

<result>9/80 = around 0.1125</result>