Calculation: (5/7)*(4/9)*(7/10).
计算：(5/7)*(4/9)*(7/10)．
<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

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

<gadget id="calculator">7 / 10</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">(5/7) * (4/9) * (7/10)</gadget>
<output>2/9 = around 0.222222</output>

<result>2/9 = around 0.222222</result>