column calculation. Subtract the sum of (1/10) and (3/8) from (3/5). What is the difference?
列式计算．从(3/5)里面减去(1/10)与(3/8)的和．差是多少？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

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

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">(1/10) + (3/8)</gadget>
<output>19/40 = around 0.475</output>

<gadget id="calculator">(3/5) - (19/40)</gadget>
<output>1/8 = around 0.125</output>

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