(15/16)x=(15/4), the correct value of x is x=how much
(15/16)x=(15/4)，x的正确值为x=多少
<gadget id="calculator">15 / 4</gadget>
<output>15/4 = around 3.75</output>

<gadget id="calculator">16 / 15</gadget>
<output>16/15 = around 1.066667</output>

<gadget id="calculator">(15/4) * (16/15)</gadget>
<output>4</output>

<result>4</result>