A decimal, if its decimal part is expanded by 4 times, it will get 3.4, and if it is expanded by 5 times, it will get 4. What is this decimal?
一个小数，如果把它的小数部分扩大4倍得到3.4，扩大5倍就得到4．这个小数是多少？
<gadget id="calculator">4 - 3.4</gadget>
<output>0.6</output>

<gadget id="calculator">5 - 4</gadget>
<output>1</output>

<gadget id="calculator">0.6 / 1</gadget>
<output>0.6</output>

<gadget id="calculator">0.6 * 4</gadget>
<output>2.4</output>

<gadget id="calculator">3.4 - 2.4</gadget>
<output>1</output>

<gadget id="calculator">1 + 0.6</gadget>
<output>1.6</output>

<result>1.6</result>