If a is enlarged by 10 times, it is 3.6, and b is reduced by 10 times, and it is 4.5, then what is the value of b:a
若把a扩大10倍是3.6，把b缩小10倍是4.5，则b：a的值是多少
<gadget id="calculator">45 / 0.36</gadget>
<output>125</output>

<result>125</result>