((3/4)-(3/4)*(2/5))/(1/5)*5 how much.
((3/4)-(3/4)*(2/5))/(1/5)*5多少．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(3/4) * (2/5)</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(3/4) - (3/10)</gadget>
<output>9/20 = around 0.45</output>

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

<gadget id="calculator">(9/20) / (1/5)</gadget>
<output>9/4 = around 2.25</output>

<gadget id="calculator">(9/4) * 5</gadget>
<output>45/4 = around 11.25</output>

<result>45/4 = around 11.25</result>