5.1/0.4, the quotient is 12, what is the remainder
5.1/0.4，商是12，余数是多少
<gadget id="calculator">12 * 0.4</gadget>
<output>4.8</output>

<gadget id="calculator">5.1 - 4.8</gadget>
<output>0.3</output>

<result>0.3</result>