When 0.5 is divided by 1.2 times of a number, the quotient is 9.6. Find this number.
0.5除一个数的1.2倍，商是9.6，求这个数．
<gadget id="calculator">0.5 / 1.2</gadget>
<output>0.416667</output>

<gadget id="calculator">9.6 * 0.416667</gadget>
<output>4.000003</output>

<result>4.000003</result>