What is the remainder when the quotient is 4.2 when calculating 9.7/2.3
计算9.7/2.3时商为4.2时，余数是多少
<gadget id="calculator">2.3 * 4.2</gadget>
<output>9.66</output>

<gadget id="calculator">9.7 - 9.66</gadget>
<output>0.04</output>

<result>0.04</result>