What is the difference between the largest pure decimal and the smallest decimal with 3, 4, 0, 7.
用3、4、0、7组成的最大的纯小数与最小的带小数的差是多少．
<gadget id="calculator">3.047 - 0.743</gadget>
<output>2.304</output>

<result>2.304</result>