What is the difference between (3/4) minus the product of (5/9) and (63/100)? How many.
(3/4)减去(5/9)与(63/100)的积，差是多少？多少．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">63 / 100</gadget>
<output>63/100 = around 0.63</output>

<gadget id="calculator">(5/9) * (63/100)</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">(3/4) - (7/20)</gadget>
<output>2/5 = around 0.4</output>

<result>2/5 = around 0.4</result>