Given that 4:x=5:12, then x=how many.
已知4：x=5：12，则x=多少．
<gadget id="calculator">5 / 12</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">4 / (5/12)</gadget>
<output>48/5 = around 9.6</output>

<result>48/5 = around 9.6</result>