(3/5) of a number is equal to (2/5) of (1/4), find this number.
一个数的(3/5)与(1/4)的(2/5)相等，求这个数．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

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

<gadget id="calculator">(1/4) * (2/5)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(1/10) / (3/5)</gadget>
<output>1/6 = around 0.166667</output>

<result>1/6 = around 0.166667</result>