number (4/9) is 15 (1/10), what is this number?
一个数的(4/9)是15个(1/10)，这个数是多少．
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

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

<gadget id="calculator">(1/10) / (4/9)</gadget>
<output>9/40 = around 0.225</output>

<gadget id="calculator">15 * (9/40)</gadget>
<output>27/8 = around 3.375</output>

<result>27/8 = around 3.375</result>