column calculation. Divide the difference between (3/5) minus (3/20) by the product of 12.5 and 0.8, what is the quotient?
列式计算．用(3/5)减去(3/20)的差除以12.5与0.8的积，商是多少？
<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">12.5 * 0.8</gadget>
<output>10</output>

<gadget id="calculator">(9/20) / 10</gadget>
<output>9/200 = around 0.045</output>

<result>9/200 = around 0.045</result>