When the quotient of 0.85/0.2 is 4, what is the remainder?
0.85/0.2的商是4时，余数是多少．
<gadget id="calculator">0.2 * 4</gadget>
<output>0.8</output>

<gadget id="calculator">0.85 - 0.8</gadget>
<output>0.05</output>

<result>0.05</result>