What is the product of (9/10) times (2/5) divided by (4/9)?
(9/10)乘(2/5)除(4/9)的商，积是多少？
<gadget id="calculator">9 / 10</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

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

<gadget id="calculator">(4/9) / (2/5)</gadget>
<output>10/9 = around 1.111111</output>

<gadget id="calculator">(9/10) * (10/9)</gadget>
<output>1</output>

<result>1</result>