(5/6) of (9/10) is equal to (1/3) of a number, find the number.
(9/10)的(5/6)与一个数的(1/3)相等，求这个数．
<gadget id="calculator">9 / 10</gadget>
<output>9/10 = around 0.9</output>

<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(5/6) / (1/3)</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">(9/10) * (5/2)</gadget>
<output>9/4 = around 2.25</output>

<result>9/4 = around 2.25</result>